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Dealing with Devitrification

A common phenomenon that many kilnformers encounter is devitrification. Devitrification, or devit, is the growth of crystalline structures on the surface of glass. It generally appears as a haze or scum that no amount of cleaning will …

Working with Frit Balls

Dots are a fundamental element of design. In kilnforming, you can incorporate round dots into your work by creating frit balls. These tiny spheres of glass are the result of firing pieces of coarse frit until they are transformed into …

Is Bullseye glass food safe?

Below we have listed the Bullseye glasses that contain more than 1.0% lead or more than 0.5% cadmium. If you are using any of these styles for food-bearing objects we recommend capping them with Bullseye clear glass. In our tests we have read more

Expanding the Color Palette: Composite Colors

"Bullseye already makes enough colors."- Klaus Moje Bullseye makes an extensive palette of sheet glass colors. But that's just the beginning. You can create an even broader array of hues for use in kiln-glass projects by firing two …

Why Did It Break?

Kilnforming glass can yield results that range from elegantly simple to intriguingly complex. But when a piece emerges from the kiln cracked or broken, the results are just disappointing. The good news is that a piece always breaks for…

Powder Printing

Powder printing allows artists to produce archival images on glass with a wide range of colors, textures, and layers of transparency. Practitioners of this process include Stacy Lynn Smith, Catharine Newell, and Kathryn Wightman. Stude…

Inline Plate Project

In this project-based lesson, we'll work with stringer to create a simple and pleasing line-based design. In this lesson you will learn how to make a fused and slumped plate using 2mm stringer and 3mm sheet glass. Then we'll consider d…

How do I coldwork my kilncast piece?

That depends on the piece and what you want to accomplish with coldworking. If the piece includes a reservoir that needs to be removed this can be taken off with a wet tile saw with a diamond blade or it can be ground off using rotary tools read more

Screen Printing with Hand-Cut Stencils

Screen printing provides an effective way for artists to transfer various kinds of imagery to glass. There are many ways to prepare screens for printing, the most common being the emulsion method. This lesson explores another approach …

Coldworking with Diamond Hand Laps

Much like its humble cousin sandpaper, the diamond hand lap is used to make rough surfaces and sharp edges smooth. Unlike sandpaper, the abrasive surface of a hand lap is composed of bonded diamonds. This surface is attached to an ergo…

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Fine Lines

Candle-bent Fine Line stringers bring a lean line quality to this Mid-Century inspired design. Bend the Stringer Holding the stringer with thumbs and forefingers' place the spot you want to bend in the tip of a candle flame…

Fresh Color

New color palettes bring freshness to artworkYou can discover professionally curated' current color combinations to make your own in magazines and websites about design' interiors' and even fashion. An article about bedroom…

Opaline Ring

Put a Ring On It! Explore the possibilities of a palette of green rings capped with Opaline! As an overlay' Opaline scatters light for a dramatic impact on base colors. Note the blue hue it adds to the dark-valued green here and…

GlassTips: Opalescents

What to expect from selected Bullseye sheet glass. This handy reference guide explains what you can expect from your Bullseye sheet glass colors before and after heatwork in the kiln. Click on the small style swatches to the left…

Mold Tips: Deep Form

Overview This set of molds that make it possible to create deep-slumped bowls through a three-step process. Each consecutive firing shapes the form' ultimately resulting in a relatively deep' tall' steep-sided vessel. Note'…

Mold Tips: Big Bowl

Overview The Big Bowl mold produces a classic wide fruit- or salad-style bowl with a stable base. We've achieved the most consistent results by using it as the second part of a two-stage slump' combined with frequent…

GlassTips: Transparents

What to expect from selected Bullseye sheet glass. This handy reference guide explains what you can expect from your Bullseye sheet glass colors before and after heatwork in the kiln. Click on the small style swatches to the left…

Stripes and Dots

Rods are a natural choice for easy stripes and dots. We found this summer-themed nautical palette of opalescents fresh and irresistible for mixing and matching. StripesUse a complete layer of rods as the base' then cap…

Iridescent Squares

You can transform a single sheet of Rainbow Iridescent glass into a shimmering design by cutting it into squares and reconfiguring the pieces. 7.5 x 15 inch (190 x 380 mm) tile composed of pieces from a single sheet of Black…

Powder Power

A thin layer of powder has power! Light Turquoise and Clear Powder (001101-0008-F)' unfired. Same' capped with Tekta Clear & fired with schedule provided. Minimal bubbles. For comparison' same sheet glass lay-up…

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Dealing with Devitrification

A common phenomenon that many kilnformers encounter is devitrification. Devitrification, or devit, is the growth of crystalline structures on the surface of glass. It generally appears as a haze or scum that no amount of cleaning will …

Working with Frit Balls

Dots are a fundamental element of design. In kilnforming, you can incorporate round dots into your work by creating frit balls. These tiny spheres of glass are the result of firing pieces of coarse frit until they are transformed into …

Expanding the Color Palette: Composite Colors

"Bullseye already makes enough colors."- Klaus Moje Bullseye makes an extensive palette of sheet glass colors. But that's just the beginning. You can create an even broader array of hues for use in kiln-glass projects by firing two …

Why Did It Break?

Kilnforming glass can yield results that range from elegantly simple to intriguingly complex. But when a piece emerges from the kiln cracked or broken, the results are just disappointing. The good news is that a piece always breaks for…

Inline Plate Project

In this project-based lesson, we'll work with stringer to create a simple and pleasing line-based design. In this lesson you will learn how to make a fused and slumped plate using 2mm stringer and 3mm sheet glass. Then we'll consider d…

Screen Printing with Hand-Cut Stencils

Screen printing provides an effective way for artists to transfer various kinds of imagery to glass. There are many ways to prepare screens for printing, the most common being the emulsion method. This lesson explores another approach …

Coldworking with Diamond Hand Laps

Much like its humble cousin sandpaper, the diamond hand lap is used to make rough surfaces and sharp edges smooth. Unlike sandpaper, the abrasive surface of a hand lap is composed of bonded diamonds. This surface is attached to an ergo…

Open-Faced Kilncasting

For the artist who wants to make sculptural glass, open-faced kilncasting offers a relatively simple and direct technique. It also serves as an introduction to principles used in more complex kilncasting methods. The process involve…

Box Casting

Box casting is a great way to create a reverse-relief, cast-glass object with exceptional clarity. The results are typically clean and predictable, making the process ideal for producing multiple editions of a piece. In this lesson,…

Working Deep

Working Deep is a method of floating or embedding imagery or color within a thick block of glass. The method involves stacking and fusing multiple layers, using the transparency of the material to create a three-dimensional design. Whe…

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What is Bullseye's glass coding system?

Bullseye Glass Coding System PDF

Is Bullseye glass COE 90?

Glass users who ask this question usually want to know if they can successfully fuse Bullseye with another manufacturer's glasses. Unfortunately, the answer to this question is not simple. Our short response is this: Matching…

What are "striking" glass colors?

A small number of Bullseye glasses appear pale or colorless in the cold sheet, but "strike" or mature to target color when fired. The images of striking glasses in our online store and product catalog show how colors appear before and…

Is Bullseye glass compatible in all conditions?

Bullseye glasses are well known for reliable compatibility. But understanding the conditions of our factory testing is important, especially for anyone firing glass under unusual or extreme conditions. To learn about our compatibility…

What can I expect from Bullseye rods?

In the production of Bullseye rods, five characteristics are evaluated: Compatibility: Bullseye Compatible rod styles are factory tested to the same standards as other Bullseye Compatible materials for kilnforming. Color:…

Is Bullseye glass food safe?

Below we have listed the Bullseye glasses that contain more than 1.0% lead or more than 0.5% cadmium. If you are using any of these styles for food-bearing objects, we recommend capping them with Bullseye clear glass. In our tests we…

How and why should I clean glass before firing it?

Cleaning glass removes problem-causing contaminants like glass-cutting fluid, oils, minerals, salts, dusts, fibers, sticker residues, pen marks, and fingerprints. If these contaminants are not removed from glass before it's fired,…

What is coldworking?

Coldworking is changing the shape or surface texture of glass, using tools and processes that do not rely on heat. Coldworking methods include grinding, carving, engraving, polishing, sandblasting, and other techniques.

What coldworking equipment do I need?

In short, you need the equipment that's right for the type of work you're making and the results you want to achieve. We recommend that you take a class to learn about the range of possibilities and try out various kinds of equipment…

How can I learn to cut glass?

We recommend that you take a class to learn the fundamentals. In a class, you'll find out about the best tools and techniques to use and will have a chance to practice before investing in glass and equipment for your own studio. Check…

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