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Why should I fuse and slump glass in separate firings?

Fusing and slumping are two unique processes requiring their own unique firing schedules to get right. It's not possible to conduct these processes simultaneously. A firing schedule designed with the objective of fusing and slumping at read more

What temperature should I use for tack-fusing?

A tack-fuse is a "lighter" fuse than a full fuse.  Tack-fusing is a kilnforming technique used when you want to join two or more separate pieces of glass together but also retain their individual characteristics. Tack-fusing temperatures read more

What temperature should I use for slumping?

Glass slumping is a fun and rewarding kilnforming technique used to make bowls platters plates and many other objects. Slumping projects will usually require relatively low temperatures and longer hold times in the kiln than many other read more

What temperature should I use for fusing?

Since temperatures and firing schedules can vary depending on the project you're making there's no single answer to this question. We do offer suggested firing schedules for specific projects on many of the articles and projects on our Methods read more

What schedule should I use for annealing?

Since temperatures and firing schedules can vary depending on the project you're making there's no perfect "one-size-fits-all" annealing schedule. You can learn basic principles for annealing in Technote 4 Heat & Glass. Also by scanning read more

What is tack-fusing?

Tack-fusing is kilnforming technique wherein two disparate pieces of glass are heated until they're just hot enough to stick together but not so hot that they lose their individual characteritics or fuse flat. Related Questions What read more

What is slumping?

Slumping is a kilnforming process that uses heat and gravity to transform sheet glass into the shape of a mold. One can to create an almost endless variety of forms when slumping glass. When the glass is heated in a kiln and enters a read more

What is fusing?

Fusing is the technique of joining two or more pieces of glass by heat in a kiln. There are different glass fusing techniques. For example “tack fusing” is a fusing technique in which the pieces of glass are heated until they are read more

What is firepolishing?

Firepolishing is the process of heating a glass object in a kiln to a temperature high enough to impart some level of gloss to the surface. Related Questions What temperature should I use for firepolishingHow can I cast to get some read more

What is devitrification or "devit"?

Devitrification ("devit") is the growth of crystalline structures within or on the surface of glass. ("Vitri" = glass; "devitrification" = the process of becoming un-glasslike). Devit can result from firing too slowly through the devitrification read more

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Glossary

Anneal' To cool previously heated glass through a specific temperature range in order to relieve excessive stress once the glass reaches room temperature. Annealer' More accurately called an annealing kiln or annealing oven. A…

Quick Tip: Smooth It Out

Create a smooth' uniform surface on the shelf side of your fired work—not a brush stroke in sight! First' prepare a kilnshelf with Bullseye Shelf Primer. Follow the instructions in our free video Preparing Kiln…

Quick Tip: Reaction Action

When certain Bullseye glasses are fired in contact with one another' their chemistries interact at the interface to create many effects and colors too. Here are close-up examples of some of our favorite reactions' including…

Quick Tip: Circles from Squares

You can create nicely rounded cabochons from stacks of 0.75"(20 x 20 mm) squares' thanks to heat' gravity' and the 6 Millimeter Rule. But be careful' they’re addictive! The StackTop (6 mm)' A “lensing” layer of…

Quick Tip: Fibonacci Fade Plate

The Fibonacci sequence is a numbering system found in nature' from flower petals and pinecones to seashells. It’s pleasing to the eye (even if you’re not aware of it) and a versatile design tool. It starts with a one (or a…

Quick Tip: Keen on Green

How to make green from other colors of Bullseye Glass Downloadable PDFQuick Tip' Keen on Green   TOP' Light Turquoise Blue Thin 001416-0050; MIDDLE' Clear Thin 001101-0050; BASE' Yellow Opal 000120-0030. Requires Clear…

Quick Tip: Tint Overlay Palette

  Create this soft' dreamy palette by layering Tint styles over neutral Opalescent styles. We’re in love! Tints' Pale Yellow Tint (001820-0030)' Purple Blue Tint (001948-0030)Opalescents' Light Peach Cream (000034-0030)'…

Quick Tip: Alchemy Metallic Palette

  Create gold & bronze hues by capping silver foil with Bullseye’s Alchemy Clear styles. Adding Clear to the mix expands the palette to three handsome metallics. Design Place silver foil elements on a base of 3 mm…

Using Milestone Decals

    Overview Milestone decals are printed on water-release backing paper coated with an adhesive made from cornstarch. A layer of wax paper protects the decal. For best results' apply decals to glass that has been taken…

Quick Tip: Kilncast and Slumped Bowl

Get experience in volume calculation' frit tinting' and more as you create a kilncast disc from a frit-and-powder mixture' coldwork the edges' and slump it into this graceful bowl. Prepare the Dam Cut a 1" strip of 1/16" Fiber…

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Considerations for Multiple Firings

There are many reasons you might need to fire a project multiple times to achieve a desired result. Some of the most common include:• Fusing and slumping in two separate firings• Firing components that will later be incorpora…

Powder-Colored Sheet Glass

You can create almost any color you want, when you want it, with clear sheet glass and colored glass powder.In this lesson, we'll show you how the process works and create several different sheets of colored glass. Then we'll use those…

Color Theory Basics

Color theory is the art and science of color interactions and effects.In this lesson, you'll learn some of the basics of color theory, including the vocabulary used to describe color, color schemes, the ways that colors interact, and s…

Kilncarved Sconce Project

Imagine having the capability to realize your vision of the ideal luminaire. In this lesson, we'll demonstrate how to design and fabricate your own lighting sconce.We’ll use a process called kilncarving to create a diffuser of varyin…

Alchemy Clear Drop-Out Bowls

Bullseye's Alchemy Clear sheet glass styles change the appearance of silver foil that is fired in direct contact with the glass. One style changes the silver to gold, the other changes it to bronze.These effects are the result of the c…

Opaline Ring Bowl

Bullseye's Opaline sheet glass scatters light, creating a range of effects on base colors. In this project-based lesson, we'll make a bowl using a palette of Opaline, Clear, and Pine Green.In the process, you'll learn how to intercut s…

Drawing with Glass Powder

Drawing with glass powder is a great way to explore and develop ideas. The technique frees you from the preciousness of the material, allowing you to relax and take pleasure in drawing.In this lesson, you'll see how three people respon…

Frit Tinting

Frit tinting is a technique for creating specific color blends by adding colored glass powder to Clear frit. It broadens the palette available to you, making possible colors that are often difficult to achieve in kilncasting, such as r…

Drawing with Vitrigraph Stringer

On a cold and rainy day in November, we invited three artists into the kilnforming studio at Bullseye Glass. They were each given half-sheets of white glass, a pile of vitrigraph stringers, and time to draw with those stringers.We deci…

Cascade Chevron Plate

Bullseye Cascade sheet glass opens up a wealth of creative possibilities. One option is to use it to make chevron designs.In this lesson, you'll learn about the characteristics of Cascade sheet glass, effective methods for cutting narr…

New to using Bullseye Glass?

 "Your choice of glass is probably the most important decision you will make as a kilnformer." -Artist Steve Immerman on why he exclusively uses Bullseye. Bullseye glass is developed by artists, for artists. We've got your…

Is it safe to fire Bullseye Glass in a kiln?

Yes. At cold temperatures and typical firing temperatures, the colorants are encapsulated in the glass and the glass does not emit odors or toxics into the air. However, ventilation is recommended to dissipate odors from shelf…

What is The Rule of Halves?

This rule is important to know for successful glass cutting. A score is more likely to run properly when there are equal amounts of glass on either side of it. This is particularly important for cutting strips of…

Why should I choose Bullseye glass over other glasses?

When you buy Bullseye glass, you're investing in top-quality materials and technical resources: Our standards for testing and quality are the highest in the industry and our products are unsurpassed for consistency and…

How do I know which Bullseye clear glass to use?

Tekta is Bullseye's signature style of clear glass. Bullseye manufactures two styles of its Tekta glass: Tekta Clear and Tekta Crystal Clear. Tekta Crystal Clear is recommended for crystal clarity, especially in thicker works.…

Can I get samples of your glass?

Yes. Our popular sample sets for sheet glass, billets, and rods are great resources for any studio. Note that these samples are for color reference only. They are not intended for reheating and may not be fusible.

Is there bubble-free glass?

Bubbles are found in all handcrafted glasses. They contribute to the art and beauty of finished glasswork. You can learn to minimize bubble formation or to create bubble patterns and effects by reading TechNotes 5: Volume &…

What are Special Production glasses?

Occasionally we produce limited runs of top grade glass styles that are not included in our regular product line. We refer to these as “Special Production” sheets. Special Production sheets may be one-of-a-kind or available in…

What are Curious glasses?

The grading system for our handmade glass demands that each sheet match a target color and have a uniform appearance to receive first-quality grade. Glass that is not quite the target color or that has some other…

Is all Bullseye glass recommended for fusing?

No, but all of our glass goes through a rigorous quality assessment and assigned a grade. Our top-quality sheet glass comes in two grades: Fusible and Standard (non-fusible). Fusible glass is coded as “F” and Standard or…

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