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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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Quick Tip: Raise the Bar on Your Soap Dish

Add an accent color—and functionality—to your new soap dish with a little help from Bullseye fusible rods! We paired Robin’s Egg Blue Opalescent with Driftwood Gray rod' but you could use any combination.   Step…

Using Color Line Screen Paste

Overview Color line screen paste offers the ability to add high-pigmentation design elements and imagery onto sheet glass with no powdered enamels to mix. Pastes come ready to print' and are available in a wide range of…

Mold Tips: Heart Casting Mold (8976)

More Information Mold Tips' Heart Casting Mold (8976) PDF Helpful Resources Clean Shield Gel product useFrit tinting articleFrit tinting videoMold Tips' Suggested Slumping SchedulesTips for Using Bullseye Slumping…

Quick Tip: Working with Petrified Wood

Petrified Wood is Bullseye’s magical unicorn streaky. Its unique combination of glasses results in dramatic internal reactions at full-fuse temperatures. Here are two ideas for making this glass sing.   Copper…

Quick Tip: Fresh Palette Picks

“Greenery is symbolic of new beginnings.” —Pantone Color giant Pantone has named Greenery their 2017 Color of the Year. We’ve had green (and new beginnings) on our minds lately' too. So we’ve created an inspiring set…

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…

Amaco Black Underglaze Pencil

Overview You can make permanent marks on your glass projects with these underglaze pencils. Sign your name or add other handwritten text Draw on one or more layers Create shading effects For more tips' download our…

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…

Working with Accucast 880 Blue

Overview Accucast 880 Blue is a type of alginate that is fairly easy to mix and sets in 5-10 minutes. It has a somewhat short working life and will dry out and shrink over a couple of days. However' if kept in a sealed…

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…

Soap Dish

In this project, use sheet glass, rod, and a soap dish mold to create functional dishes with raised elements that elevate your soap from the dish. This step-by-step process uses basic glass-cutting principles, demonstrates the applicat…

Multicolor Screen Printing with Color Line Pastes

Color Line Screen Pastes are a great alternative to working with powdered enamels for screen printing on glass. Because they come pre-mixed into a medium, there is no need to mix powders. Just open the container, stir with a palette kn…

Screen Printing Basics with Color Line Pastes

In our two-part lesson Screen Printing with Enamels, we covered how to print on glass using powdered enamels added to a liquid medium. While this is a very effective and accessible process, using powdered enamels requires local ventila…

Artists at Work: Dustin Sherron

Color Line Paints make it easy to create imagery on glass just as you would on canvas. These lead-free enamels are ready to use directly out of the container and can be mixed to create additional hues.In this lesson, artist Dustin Sher…

Laser-Printed Sepia Decals

In this project-based lesson, we will take a photograph and make it into a laser-printed decal. Then we'll fire the decal onto glass to make a fused and slumped plate.This process works with laser printers because the toner they use co…

Petrified Wood Bowl

In this project-based lesson, we'll work with a streaky sheet glass style called Petrified Wood. We'll cover some of the basic characteristics of this style, which contains a unique combination of reactive glasses that develop with hea…

Artists at Work: Narcissus Quagliata

In the summer of 2015, artist Narcissus Quagliata came to Bullseye's Research and Education studio in Portland, Oregon, to create a new work of art in fused glass.Although universally considered a master of this medium, he stated that …

Boiled Glass

Boiling liquid is the action of bringing a liquid to the temperature at which it bubbles and turns to vapor. Boiling glass is the action of bringing layers of sheet glass and crushed glass frit to extremely high process temperatures wh…

Working with Rolled Edges

Every handmade sheet of glass produced at Bullseye starts off the same way: as blob of molten glass passing through a set of rollers. Sheet glass emerges from this process with irregular, rounded edges, often referred to as “roll…

Tips for Tack Fusing

Tack fusing is an effective method for creating textured works in kilnformed glass.In tack fusing, glass is fired within a range that creates enough heatwork for the material to fuse while maintaining the desired amount of form and tex…

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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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