One of the most practical challenges in any glass studio is keeping your materials straight. You have your COE90 glass for some projects and your COE96 for others, and compatibility is always on your mind. This is where Glassline paints truly shine and simplify your life. Unlike other fused glass paints that are formulated for a specific glass type, Glassline is designed to work beautifully with both. This means you can invest in one set of paints for your entire studio—whether you’re working with Bullseye, System 96, or even dichroic glass. This versatility is a game-changer.

Key Takeaways

• Use One Paint for All Glass: Glassline paints are compatible with both COE90 and COE96 glass, which means you don’t need separate paints for different projects. This saves you from buying extra supplies and lets you focus on your art.
• Master the Fundamentals for Best Results: To avoid common issues like flaking or bubbling, always start by cleaning your glass thoroughly. Apply paint in thin layers, letting each one dry completely, and make a small test piece to see how your colors will fire.
• Your Kiln Determines the Texture: The firing schedule you choose is a creative decision. A lower temperature tack fuse will preserve texture and create raised lines, while a higher temperature full fuse will result in a smooth, glossy finish with colors melted into the glass.

So, What Are Glassline Paints?

If you’ve ever wanted to draw intricate designs on your fused glass, Glassline paints are about to become your new best friend. They offer a simple way to add a personal, artistic touch, letting you create everything from fine lines to soft, shaded areas. They come in easy-to-use pens and pots, making them perfect for both seasoned artists and those just starting their glass fusing journey. Let’s look at what makes these paints so special and how you can use them to bring your creative ideas to life.

What Are Fused Glass Paints?

Fused glass paints, often called glass enamels, are your ticket to adding detailed artwork and brilliant color to your glass pieces. Think of them as a special kind of paint made from finely ground glass particles suspended in a liquid medium. This allows you to paint, draw, or shade directly onto your fusible glass. When you fire the piece in a kiln, the paint doesn’t just dry on the surface; it melts and permanently fuses with the base glass. This creates a durable, seamless design that won’t chip or fade. It’s the perfect way to move beyond just cutting and layering glass, giving you the freedom to add your own unique, hand-drawn illustrations and patterns to your work.

One of the biggest advantages of using modern fused glass paints is their incredible versatility. Many are formulated to be compatible with a wide range of glass, which is a huge relief for any artist trying to manage their studio supplies. This means you can use the same set of paints for your COE90 projects and your COE96 pieces without worrying about stress fractures or compatibility issues. You no longer have to buy and store separate sets of enamels for different types of glass. This simplifies your workflow, saves space, and ultimately gives you more freedom to mix and match materials as your creativity dictates, knowing your paints will work beautifully every time.

These paints come in a spectrum of vibrant colors that hold their intensity even after firing in a kiln. You can mix them to create custom shades, and they are available in different consistencies, from thin lines in a pen to thicker paint in a jar that’s perfect for brushing on. The final look of your design is also influenced by your firing schedule. A lower temperature tack fuse can leave your painted lines with a slightly raised texture, while a full fuse will melt everything smooth for a glossy, integrated finish. Experimenting with these variables is part of the fun and allows you to achieve a wide range of artistic effects.

How Do They Actually Work on Glass?

The magic of Glassline paints is their simplicity. These water-based paints are incredibly user-friendly. You can apply them directly from the bottle or use a brush for more traditional painting. One of their best features is versatility; you can paint on the top surface or sandwich the paint between layers of COE90 glass to create depth. For a softer look, you can even thin them with water and spray them on for delicate shading. Once you’re happy with your design, the piece is fired in a kiln. A firing temperature around 1500°F is recommended, but you can experiment to achieve unique effects.

Liquid vs. Powder: Understanding the Forms

When you start looking at glass paints, you’ll notice they generally come in two forms: liquid and powder. Liquid paints, like Glassline, are often water-based and come ready to use in bottles or pens. They are fantastic for drawing, writing, and painting directly onto your glass. On the other hand, you have powdered paints, which are essentially finely ground glass enamels. These need to be mixed with a medium (like water or a specialized liquid) to create a paint-like consistency. While they require an extra step, powders give you complete control over the thickness and transparency of your paint. Both are excellent for adding fine details to your projects without the texture of glass frit, and both are fired in a kiln to become a permanent part of your art.

Beyond Fusing: Other Uses for Glass Paints

While these paints are designed for fusing, their creative potential doesn’t stop there. You can use them to add intricate, kiln-fired details to traditional stained glass projects. Imagine painting delicate veins on a leaf or adding a date to a commemorative panel before you even start foiling. Once fired, the design is permanent and won’t scratch off. This technique also works beautifully for making unique glass jewelry. You can paint tiny, detailed images or patterns onto small glass pieces, fire them, and then turn them into pendants, earrings, or bracelet charms. It’s a wonderful way to combine painting and glasswork to create truly one-of-a-kind pieces that stand out.

Exploring Brands and Finishes of Fused Glass Paints

One of the most common questions artists ask is, “How do I know which fusing paint to use for my project?” With so many brands and types on the market, it can feel a bit tricky to figure out where to start. The right choice really comes down to your specific goals and artistic style. Before you buy, think about a few key factors. First, consider the glass you use. Is it COE90 or COE96? Some paints are formulated for a specific COE, while others are more universal. Next, think about how you want to apply it. Do you prefer the control of a pen, the flow of a brush, or the texture of sifted powder? Different brands excel in different application methods.

Finally, consider the finish you want to achieve. Are you looking for bold, opaque colors, or a more transparent, watercolor-like effect? Do you want a smooth, glossy surface or a textured one? The brand of paint you choose, along with your firing schedule, will determine the final look. For example, a full fuse in your kiln will melt the paint smoothly into the glass, while a tack fuse can leave lines raised and defined. Understanding these variables will help you select the perfect paint to bring your vision to life.

An Overview of Popular Brands

Now that you have an idea of what to look for, let’s get familiar with some of the most popular brands you’ll encounter. Each one has its own strengths and is favored by artists for different reasons. We’ll look at Glassline, known for its incredible versatility and ease of use, making it a studio staple for many. We’ll also touch on Fuse Master, which offers both traditional enamel powders and convenient ready-to-use liquids. Finally, we’ll cover Color Line, a brand celebrated for its highly pigmented paints perfect for creating sharp, vibrant details. Getting to know these options will help you find the right tool for your next masterpiece.

Glassline

Glassline is a favorite for a simple but powerful reason: it’s compatible with virtually all types of fusible glass. As their product details state, “Glassline paints are compatible with both COE90 glass and COE96 glass, which means you don’t need separate paints for different projects.” This is a huge advantage, saving you space, money, and the headache of managing separate supplies. Available in user-friendly bottles with a fine metal tip for drawing, they are perfect for creating crisp lines and details. Since they are water-based, they are also easy to thin for brushing or to clean up, making them an incredibly straightforward and reliable choice for any glass artist.

Fuse Master, Color Line, and Others

Beyond Glassline, other brands offer unique qualities. Fuse Master is well-known for its high-quality enamel powders, which you can mix with a medium to create your own custom paints. For those who want convenience, their EZ-Squeezy line offers pre-mixed liquid enamels that are ready for direct application. Color Line paints are another excellent option, prized for their intense pigmentation. Available in pens and liquids, they are perfect for artists who want to brush, sponge, or even airbrush bold, vibrant colors onto their work. Exploring these different brands allows you to find the perfect match for your technique and desired aesthetic.

Choosing Your Finish: Opaque, Transparent, or Metallic

Glassline offers a beautiful range of paint types for any project. Opaque paints give you a solid, bold color. Transparent paints allow light to pass through, creating a luminous effect similar to stained glass. If you want to add sparkle, metallic paints provide a shimmery finish that catches the light. A huge bonus is that all Glassline paints are lead-free and food-safe once fired, so you can confidently use them on plates and bowls. They are designed to work with a variety of glass, including popular options like COE96 glass.

Glassline vs. Other Glass Paints: What’s the Difference?

When choosing a paint for glass, compatibility is everything. This is where Glassline truly shines. Unlike some paints formulated for specific glass types, Glassline is compatible with both COE 90 and COE 96 glass. This means you don’t have to buy separate paints for your Bullseye and System 96 projects. This versatility makes it a go-to choice for artists who work with different materials or for beginners who want a reliable paint that works with most common fusing glass. It simplifies your studio and lets you focus on creating.

Which Glassline Paint Kit Is Right for You?

One of the best ways to get started with Glassline is by grabbing a paint kit. These kits are thoughtfully curated to give you a specific color palette, which takes a lot of the guesswork out of choosing individual bottles. Whether you’re drawn to warm, tropical hues or cool, icy tones, there’s likely a kit that matches the vision for your next project. Think of them as a creative launchpad. You get a collection of colors that are already designed to work beautifully together, so you can spend less time color-matching and more time painting. This is especially helpful when you’re still learning how different colors will change in the kiln.

The kits are also a fantastic way to experiment without committing to a huge collection of paints right away. You can get a feel for how the colors interact, how they fire, and which ones you use the most. From there, you can always expand your collection with individual bottles of your favorite shades. Glassline Paints are designed for glass and are compatible with a wide range of firing temperatures, making them a reliable choice for your fused glass art. They are a go-to for many artists because of their consistency and ease of use. Let’s look at some of the most popular kits and the creative possibilities they hold.

Starting Simple: The Basic Kit

If you’re just starting your journey with Glassline paints, the Basic Kit is your perfect entry point. It typically comes with a set of fundamental colors, like primaries and a few essential secondary shades. This selection gives you everything you need to start mixing and creating your own unique palette right out of the box. You can blend them to achieve nearly any color you can imagine, making it an incredibly versatile and cost-effective option for beginners. It’s the ideal foundation for building your paint collection and learning the principles of color theory as it applies to glass.

For Vibrant Colors: The Tropical Kit

For artists who love working with bright, energetic colors, the Tropical Kit is a dream come true. This set is packed with vibrant shades like turquoise, coral, and sunny yellow that instantly bring a sense of warmth and life to your work. These colors are perfect for creating bold, eye-catching designs, from beach-themed platters to abstract pieces that pop with color. The lively palette is fantastic for artists looking to bring a splash of color to their fused glass projects and create art that feels joyful and dynamic. It’s like a vacation in a box.

For Cool Tones: The Glacial Kit

On the opposite end of the spectrum is the Glacial Kit, which features a collection of cool, serene colors inspired by icy landscapes. Inside, you’ll find shades like frosty white, soft gray, and a range of icy blues. This palette is wonderful for creating pieces with a calm, tranquil mood. You can use these colors to design beautiful winter-themed pieces, minimalist patterns, or art that captures the quiet beauty of nature. The subtle and sophisticated tones work together harmoniously, allowing you to build delicate layers and add a touch of understated elegance to your work.

For Subtle Effects: The Champagne Bubble Kit

If you want to add a touch of sparkle and sophistication to your art, the Champagne Bubble Kit is an excellent choice. This unique set includes metallic and shimmering colors like soft golds, silvers, and pearlescent shades that catch the light beautifully after firing. These paints are perfect for adding elegant details, creating luxurious borders, or making your entire piece shimmer. Many artists love this kit for making jewelry or special occasion fused glass pieces because it provides a high-end, celebratory finish that makes any design feel a little more special.

For Coastal Vibes: The Beach Kit

Designed to capture the calming essence of the coast, the Beach Kit features a palette of earthy, natural tones. You’ll find colors like sandy beige, soft ocean blue, and seafoam green that evoke a relaxing day by the water. This kit is ideal for artists who want to create art inspired by the seaside, whether it’s a literal landscape or an abstract piece that reflects the tranquility of the shore. These colors are perfect for anyone wanting to bring the beauty of the coast into their glass creations, offering a more muted and natural take on a coastal theme compared to the brighter Tropical Kit.

Specialty Paints for Unique Effects

Beyond the basic kits, Glassline offers specialty paints that open up even more creative doors. You can mix and match different types to achieve stunning, complex results. For example, you could lay down a solid background with an opaque paint, then draw delicate, shimmery details over it with a metallic pen. Transparent paints are perfect for layering, allowing you to build up color and light in a way that mimics traditional stained glass. The key is to think about how light will interact with your finished piece. A solid, opaque color will stop light, while a transparent one will glow. A metallic finish will catch and reflect it, adding a dynamic sparkle to your art.

Understanding Cost and Product Variety

Getting started with a new medium can feel like a big investment, but Glassline makes it accessible. You can buy paints in many colors, either one by one or in sets. The kits we discussed are a great value and perfect for exploring a specific palette, but you’re never locked in. As you discover your favorite colors—the ones you reach for again and again—you can purchase individual bottles to restock your supply. This flexibility allows you to build your collection over time, based on your own artistic style and needs. It’s a smart way to manage your studio budget while ensuring you always have the right colors on hand for your next project.

Safety First: Working with Fused Glass Paints

As we get creative in the studio, it’s important to make safety a priority. Working with glass and heat requires a bit of know-how, but following a few simple guidelines ensures you can focus on your art with peace of mind. Thinking about safety isn’t about limiting creativity; it’s about creating a sustainable practice that lets you enjoy your craft for years to come. From ensuring the functional pieces you make are safe for everyday use to protecting yourself while you work, a few key considerations will set you up for success. Let’s go over the most important safety topics when working with fused glass paints.

Is It Food Safe? The Importance of Capping and Lead-Free Paints

One of the most common questions artists have is whether their finished pieces are food-safe. The great news is that all Glassline paints are lead-free and non-toxic, making them safe for functional tableware once properly fired. However, it’s a good habit to always check the labels on any art supply you use. While most modern fused glass paints are safe, some specialty enamels may contain lead and are not suitable for food surfaces. For an extra layer of safety and a professional, glossy finish, many artists choose to “cap” their designs. This simply means placing a layer of clear glass over your painted design before firing it in the kiln. This completely seals the paint within the glass, ensuring a durable and perfectly smooth surface.

Essential Safety Gear: Respirators and Ventilation

Protecting yourself is just as important as protecting the end-user of your art. While Glassline paints are non-toxic in their liquid form, the fine glass powders and frits you might use alongside them can be harmful if inhaled. It’s always a good idea to work in a well-ventilated area to keep the air in your studio fresh. Furthermore, wearing a dust mask or a respirator is a crucial habit, especially when working with any kind of powder or when coldworking your glass after firing. Reputable suppliers understand the importance of artist safety, which is why you’ll often see safety items sold right alongside creative supplies. Making safety gear a standard part of your studio setup is a sign of a true professional.

How to Use Fused Glass Paints: A Step-by-Step Guide

Getting started with Glassline paints is one of the most exciting ways to add detail and personality to your fused glass projects. Think of it as drawing or painting on a unique canvas that comes to life in the kiln. The process is simple, forgiving, and offers so many avenues for creativity. Whether you want to draw fine lines, paint bold images, or create soft watercolor-like washes, Glassline makes it possible. This step-by-step guide will walk you through the entire process, from prepping your glass to applying your final creative touches. Let’s get painting!

Step 1: Prepping Your Glass for Paint

A clean slate is the secret to success. Before you even think about opening a bottle of paint, make sure your glass is completely clean. Any fingerprints, dust, or oils can prevent the paint from adhering properly, which can cause it to flake off during firing. I like to wipe my glass down with isopropyl alcohol and a lint-free cloth. Make sure the glass is totally dry before you start. For an extra smooth surface, some artists pre-fuse their base piece of COE90 glass to create a perfectly flat canvas. This isn’t a mandatory step, but it’s a great technique if you’re planning a piece with lots of intricate painted detail.

Step 2: Choosing the Right Tools

Glassline paints are incredibly versatile, and you can apply them with a variety of tools. For crisp lines, lettering, or detailed drawings, the Glassline pen applicators with their interchangeable metal tips are fantastic. You can easily swap between fine, medium, and bold tips. For filling in larger areas or creating painterly effects, your favorite paintbrushes will work perfectly. I recommend having a few different shapes and sizes on hand. Don’t be afraid to get creative with other tools, too. Sponges, stamps, and even airbrushes can be used to create unique textures and gradients on glass that you plan to slump into one of your molds.

Brushes, Sifters, and Other Application Tools

Having a variety of tools on hand lets you follow your creative impulses. While the Glassline pen applicators are perfect for controlled lines, a set of soft-bristle brushes is essential for blending colors or creating soft, watercolor-like washes. You can also get creative with texture. Try dabbing thinned paint with a sea sponge for an organic pattern, or use a sifter to gently dust powdered frit over a wet paint layer for a speckled effect. These techniques add incredible dimension, especially on pieces you plan to slump into interesting shapes using glass molds. Don’t be afraid to experiment—even simple tools from around your studio can produce surprising and beautiful results on glass.

Step 3: Applying Your First Coat

Now for the fun part. Glassline paints are water-based and have a smooth, consistent texture that’s easy to work with. You can apply them directly from the bottle for opaque coverage or thin them with a little water on a palette for a more translucent, watercolor effect. One important thing to remember is that the wet color is not the fired color. The paints often look chalky and pastel-like when wet, but they will mature into rich, vibrant hues in the kiln. Apply a thin, even coat to start. You can always add more layers, but applying the paint too thickly can sometimes lead to bubbles or an uneven finish.

Helpful Tip: Fixing Mistakes Before Firing

One of the best things about working with Glassline paints is how forgiving they are. We all make mistakes—a shaky hand, a drip where you don’t want one—but with these water-based paints, it’s no big deal. If the paint is still wet, you can simply wipe it away with a damp cloth or a cotton swab. If it has already dried, don’t worry! You can gently scrape the paint off with a craft knife or a razor blade without damaging your glass. This makes experimenting with new designs much less stressful. To help prevent common issues like flaking, remember to apply the paint in thin, even layers and let each one dry before adding the next. This simple step gives you more control and makes any potential corrections even easier to manage.

Step 4: Layering Colors for Depth

Layering is where you can build incredible depth and complexity in your work. The key is to let each layer of paint dry completely before adding the next one. If you don’t, the colors can get muddy and blend together in ways you might not intend. You can let it air dry or gently use a hairdryer on a low setting to speed things up. You can layer colors on top of each other to create new shades, just like with traditional painting. You can also paint between layers of stained glass for a softer, more dimensional look, or keep all your painting on the top layer for a crisp, defined design.

Creating Solid Color with Sifting

While Glassline paints are perfect for lines and details, sometimes a project calls for a solid, uniform block of color. This is where sifting comes in. The technique involves using a fine mesh screen to sprinkle powdered glass, also known as frit, evenly over your base glass. You can use stencils to create crisp shapes or cover the entire surface for a vibrant foundation. After firing this layer, you’ll have a smooth, colorful canvas. A fantastic way to add complexity is to combine techniques: once your sifted color base is fused, you can use Glassline pens to draw intricate designs right on top. This layering method creates incredible depth by contrasting the soft, even background with sharp, detailed linework.

Step 5: Mixing Custom Colors and Effects

This is your chance to experiment and make the design truly your own. You can mix Glassline paints on a palette to create an endless spectrum of custom colors. Try the sgraffito technique by applying a layer of paint, letting it dry, and then gently scratching a design through it to reveal the glass underneath. You can also spray thinned paint with a small spray bottle to create soft, shaded backgrounds. Because Glassline paints are compatible with both COE90 and COE96 glass, your creative options are wide open. The final appearance of your piece will also depend on your firing schedule, so don’t forget that your kiln is your final artistic tool.

Working with Water and Special Mediums

One of the best things about Glassline paints is that they are water-based, which gives you incredible control over their consistency. You’re not just stuck with the texture that comes out of the bottle. By adding a little water on a palette, you can thin the paint to create beautiful, translucent washes of color, much like watercolors on paper. This technique is perfect for adding subtle shading or a delicate background to your design. For an even softer effect, you can thin the paint more and use a small spray bottle to gently mist color onto your glass. This is a great way to create soft gradients on a piece you plan to slump into one of our unique molds. Just remember to add water slowly—it’s always easier to add more than to take it away!

Firing Fused Glass Paints: What You Need to Know

Once your masterpiece is painted and dry, the real magic happens inside the kiln. Firing is the process that permanently bonds the paint to the glass, transforming its chalky, pre-fired appearance into vibrant, beautiful color. While putting your art into a super-hot oven can feel a little nerve-wracking at first, the process is straightforward once you understand the basics. It’s all about controlling the heat to get the exact finish you want.

The key to a successful firing lies in understanding three main concepts: the type of fuse you want to achieve, your kiln’s firing schedule, and how different temperatures will affect your final piece. Deciding between a tack fuse, which preserves texture, and a full fuse, which creates a smooth surface, will be your first step. From there, you’ll program your kiln with a specific schedule of heating and cooling. Don’t worry, we’ll walk through exactly what that means. Getting this part right ensures your glass doesn’t crack from thermal shock and that your paints mature to their intended brilliant colors.

Tack Fuse vs. Full Fuse: Which Is Right for Your Project?

The terms “tack fuse” and “full fuse” describe how much the glass melts and merges together. A tack fuse happens at a lower temperature, typically around 1350°F. At this heat, the glass layers will stick (or “tack”) together, but they won’t completely flatten. This is perfect for when you want to preserve the texture and fine details of your Glassline paint designs. For example, if you’ve painted delicate lines on one piece of glass and are layering it onto another, a tack fuse will keep those lines crisp and slightly raised. It’s a great technique for adding dimension to your work.

A full fuse, on the other hand, takes the glass to a higher temperature, usually around 1450°F to 1500°F. This causes the glass layers to melt completely into a single, smooth piece. Any painted details will sink into the glass, resulting in a glossy, flat surface. This is the finish you’ll want for projects like coasters, dishes, or any piece where you want a perfectly uniform look. The choice between tack and full fusing really comes down to the aesthetic you’re aiming for.

How to Set the Perfect Firing Schedule

A firing schedule is simply the recipe of temperatures and times you program into your kiln. It tells the kiln how fast to heat up (the ramp), how long to hold at a specific temperature (the soak), and how to cool down. For Glassline paints, the manufacturer recommends firing to 1500°F for the best results. This is a great starting point for a full fuse. However, your ideal schedule will also depend on the type and thickness of your glass. For instance, a project using thin sheets of COE90 glass will require a different schedule than a thick, multi-layered piece.

Always start with the firing schedule recommended by your glass manufacturer and adjust from there. It’s a fantastic idea to keep a firing log where you note the schedule you used, the glass you worked with, and the results. This will become your personal playbook for achieving consistent, predictable outcomes every time you fire.

How Temperature Impacts Your Final Piece

The temperature you fire to has a huge impact on the final look of your Glassline paints. As Glassline Products notes, you can fire them hotter or cooler depending on the look you want. Firing at lower tack-fusing temperatures will often leave the paint with a more defined, matte, or satin finish. The lines may feel slightly raised to the touch, which adds a lovely tactile quality to your art.

When you fire to higher, full-fuse temperatures, the paint melts into the glass surface, creating a smooth and glossy finish that is fully integrated with the glass. This is where you’ll see the colors reach their maximum vibrancy. Experimenting is key. Try creating small test tiles with dabs of paint and fire them at different temperatures to see how they change. This will give you the confidence to know exactly what to expect before you commit to firing a larger, more complex project.

Brand-Specific Firing Temperature Ranges

While Glassline paints are incredibly versatile, it’s helpful to know that most glass paint brands have their own ideal firing range. Think of it as a unique recipe for success. For example, some popular paints and enamels have very specific needs; Big Mouth Paints fire best between 1475°F and 1515°F, while EZ Fire Enamels have a much wider range of 1250°F to 1650°F. Firing a paint below its recommended temperature can result in colors that don’t mature or properly adhere to the glass. On the flip side, firing too hot can cause colors to burn out or lose their opacity. The golden rule is to always check the manufacturer’s instructions for the specific product you’re using. When in doubt, making a small test tile in your kiln can save you from any unwelcome surprises with your final piece.

Painting on COE90 and COE96 Glass

One of the best things about Glassline paints is their incredible versatility. You don’t have to worry about stocking different paints for different projects, because they are compatible with the most common types of fusible glass. Whether your studio is full of COE90 glass or you prefer working with COE96 glass, Glassline has you covered. This compatibility makes your creative process so much smoother, letting you focus on your design instead of your materials. It frees you up to experiment with different glass types without needing a whole new set of paints.

If you’re new to fusing, COE stands for “coefficient of expansion.” It’s a technical way of describing how much glass expands and contracts when heated and cooled. Using glass with the same COE is essential to prevent your beautiful piece from cracking in the kiln due to stress. Since Glassline works with both major COE families, you can confidently add detail and color to almost any fusing project you can dream up. As a bonus, all Glassline paints are lead-free and food-safe once fired, so you can use them for functional pieces like plates and bowls without any concern. This opens up a whole world of possibilities for creating custom, usable art for your home or to sell.

Tips for Painting on Bullseye Glass

When working with Bullseye glass, which is COE90, you can get fantastic results with Glassline paints. For a standard, glossy finish, a good target temperature is around 1500°F. However, don’t be afraid to experiment. Firing a little hotter or cooler can create different textures and finishes, so you can really tailor the outcome to your artistic vision.

A helpful trick is to “tack fuse” your painted glass sheets before stacking them for a full fuse. This involves firing the piece just enough to melt the paint onto the glass without fully slumping it. This sets your design in place, preventing it from shifting or smudging when you add more layers for your final, full fuse in the kiln.

Tips for Painting on CBS Dichroic Glass

Glassline paints are a wonderful way to add another layer of artistry to the stunning shimmer of CBS Dichroic glass. Because the paints are water-based and easy to handle, you can apply them with precision. Try painting your designs on a clear top layer or directly onto the dichroic surface before capping.

You can also use Glassline paints between layers of glass to create a sense of depth and an almost three-dimensional effect. When you fire the piece, the painted designs will interact with the light-reflecting properties of the dichroic glass, making your artwork even more dynamic and interesting. It’s a simple technique that can produce some truly breathtaking results, adding your unique touch to the magic of dichroic.

Using Enamels on Float Glass

It’s a tempting thought for any artist on a budget: what about using all that inexpensive float glass from old windows or picture frames? While it’s a great way to save money, using Glassline paints on float glass is risky. The main issue is that float glass has an unknown and inconsistent COE, which means you can’t fuse it with COE90 or COE96 glass without it cracking from thermal shock. If you paint on a single piece of float glass and fire it, the paint will adhere, but you’re stepping into experimental territory. Float glass behaves unpredictably in the kiln and requires extensive testing to find a firing schedule that works without causing warping or devitrification. For projects where the outcome matters, sticking with reliable, tested art glass is always the best path to ensure your beautiful designs turn out just as you envisioned.

5 Common Glassline Mistakes (And How to Fix Them)

Working with Glassline paints is incredibly rewarding. That moment you open the kiln to see your vibrant design permanently fused into the glass is just magical. But getting to that perfect result involves a bit of science and a lot of art. It’s easy to get caught up in the excitement of a new project and rush through the fundamental steps, which can lead to some common missteps. I’ve been there, and trust me, almost every glass artist has a story about a piece that didn’t quite turn out as planned. Think of these “mistakes” not as failures, but as rites of passage. Learning what to watch out for can save you time, materials, and the frustration of a piece not living up to your vision.

This section is your friendly guide to sidestepping those common pitfalls. We’ll walk through the entire process, from what you do before the paint even touches the glass to the final moments in the kiln. We’ll cover why prepping your surface is non-negotiable, how the thickness of your paint application can dramatically change the outcome, and why a tiny test piece can be your project’s best friend. We’ll also talk about the importance of patience when layering colors and how your kiln’s firing schedule is the secret ingredient to success. Whether you’re working with COE96 glass or intricate dichroic sheets, mastering these details will help you create beautiful, professional-looking fused glass art with confidence. Let’s get you set up for success on your next project.

Mistake #1: Skipping the Prep Work

It’s tempting to jump right into painting, but skipping the prep work is a classic mistake. Your glass needs to be perfectly clean for the paint to adhere properly. Any dust, fingerprints, or oils on the surface can cause the paint to bubble, flake off, or fire unevenly. The solution is simple: before you begin, wash your glass with soap and water, rinse it well, and dry it with a lint-free cloth. For a final, streak-free clean, a quick wipe with isopropyl alcohol does wonders. Taking just a few minutes for proper surface preparation ensures your paint goes on smoothly and stays put during firing, giving you a clean canvas for your creativity.

Mistake #2: Applying Paint Too Thickly

When you want bold color, it’s easy to think that a thick coat of paint is the answer. However, applying Glassline paints too heavily can lead to a host of problems in the kiln. A thick application can trap moisture and air, which turn into bubbles or create a cracked, uneven texture during firing. Instead of one heavy layer, it’s much better to build up your color with several thin, even coats. This gives you more control and a much cleaner result. If you find your paint is too thick straight from the bottle, you can thin it with a little water to get the perfect consistency for smooth application.

Mistake #3: Not Doing a Test Fire

I know, I know, you’re excited to get to your main project. But trust me on this: never skip a test piece. Every kiln fires a little differently, and colors can shift depending on your firing schedule and the glass you’re using. A quick test on a small scrap of glass, using the same colors and COE90 glass as your final project, can save you from a major disappointment. This allows you to see exactly how the colors will mature and how the paint will behave in your specific setup. It’s always better to create a test piece to confirm your plan rather than risk ruining a larger, more intricate piece of art.

Mistake #4: Rushing the Drying Time

Patience is a virtue in glass art, especially when working with layers. When you’re building up colors or creating detailed designs, you must let each layer of Glassline paint dry completely before adding the next. Applying wet paint over another wet layer will cause the colors to bleed together, resulting in smudging and a loss of crisp detail. This can lead to a muddy mess instead of the sharp, defined lines you were hoping for. You can let it air dry or speed up the process gently with a hairdryer on a low, cool setting. Taking this extra time prevents the unintentional smudging and blending of colors and keeps your design work precise.

Mistake #5: Guessing Your Firing Schedule

Glassline paints are designed to mature at specific temperatures, so your firing schedule is critical to success. Simply putting your painted piece in the kiln and hoping for the best is a recipe for a disappointing outcome. Firing too hot or too fast can burn out the colors, while firing too cool may prevent the paint from bonding permanently to the glass. Always start with the recommended firing schedule provided by the manufacturer. From there, you can use your test pieces to make small adjustments based on your kiln’s unique performance and the specific results you want to achieve, whether it’s a tack fuse or a full fuse.

Ready to Start Your Glass Painting Project?

If you’re ready to add color and intricate detail to your fused glass work, Glassline paints are the perfect place to start. I often recommend them to beginners because they are so forgiving and easy to use. They come in a variety of formats, but the pens are especially great for drawing fine lines and shading directly onto your glass. This gives you a level of control that feels more like sketching on paper, which can make the transition to a new medium feel much more natural. You can apply the paint between layers of glass for a beautiful, submerged effect or paint right on the surface for a bold, graphic look.

One of the biggest reasons artists love Glassline is its incredible versatility. These paints are specially formulated to work with the most common types of fusible glass, including both COE90 glass and the popular COE96 glass families. This compatibility means you can confidently experiment across different projects without worrying about whether your materials will fuse correctly. It takes a lot of the technical guesswork out of the process, letting you focus on your creativity.

Beyond their flexibility, Glassline paints are also a safe choice for your studio and home. All products are lead-free, and once you fire them properly in your kiln, they become completely food-safe. This is a huge plus if you dream of making your own custom dinnerware, serving platters, or other functional pieces. You can create art that is not only beautiful but also usable in your everyday life. When you’re ready to dive in, exploring the different colors and kits is a great next step to bring your unique vision to life.

Related Articles

• 3 Types of Glass Art Techniques
• The Complete Guide to COE 90 Fusing Glass Supplies – ArtGlassSupplies
• A Complete Guide on, How to Prepare for Glass Fusing?
• COE Glass Meaning: A Beginner’s Guide to Fusing – ArtGlassSupplies
• How to Choose the Best Glass Kiln for Your Art – ArtGlassSupplies

Frequently Asked Questions

Are Glassline paints really food-safe? Yes, they absolutely are. Once you have fired your piece correctly in a kiln, the paints become fully fused with the glass and are completely lead-free and food-safe. This is one of my favorite features because it means you can design beautiful, custom dinnerware or serving platters that are both artistic and functional for everyday use.

Why do the paints look so pale and chalky before I fire them? That pale, pastel appearance is completely normal, so don’t worry if the wet color doesn’t match the bottle. Glassline paints are made with a water-based binder that looks chalky when it dries. During firing, this binder burns away, and the glass particles in the paint melt and mature into their true, vibrant color. It’s a magical transformation that happens every time in the kiln.

How do I clean my brushes and tools after painting? Clean-up is one of the easiest parts of the process. Since Glassline paints are water-based, you can simply wash your brushes, pen tips, and palettes with warm water and a little soap. I recommend cleaning your tools right after you finish painting, as it’s much easier to remove the paint before it has a chance to dry and harden.

Can I use any kiln to fire glass with Glassline paints on it? You don’t need a specific type of kiln just for Glassline paints. Any glass kiln that gives you control over the firing schedule will work perfectly. The important thing is that you can program the heating rate (ramp), the holding time (soak), and the cooling rate. This control is what allows you to achieve a successful tack or full fuse without damaging your piece.

What happens if I mix paints for COE90 and COE96 glass? You don’t have to worry about that at all. One of the biggest advantages of Glassline is that the entire paint line is compatible with all common fusing glass, including both COE90 and COE96. This means you can use the same set of paints for all your projects, which simplifies your process and your supply list.