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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

Can I make my own stringers?

Yes you can hand-pull your own stringers using a Vitrigraph kiln. If you have the opportunity to use a Vitrigraph kiln we highly recommend you take it. Not only is it fun but you will be able to make unusually shaped stringers that can read more

What's the difference between kilncasting and lost wax kilncasting?

Lost wax kilncasting is just one of many kilncasting methods. To learn more about this method see TipSheet 8 Basic Lost Wax Kilncasting  or our Video lesson Lost Wax Kilncasting. FAQs Return to Index of FAQs  read more

What types of kilncasting can I do?

Kilncasting projects generally fall into one of two broad categories those which are made in open-faced molds and those that are made in closed or semi-closed molds. In open-faced molds one side of the mold is left completely open. read more

What molds are used for kilncasting?

Molds for kilncasting fall into two broad categories open-faced or closed/semi-closed. In open-faced molds one side of the mold is completely open; the cold glass is placed directly into the mold through that opening. Using open-faced read more

What kiln should I use for casting?

Almost any kiln that will fit your mold setup will work.  The most important thing to consider when selecting a kiln for casting work is whether there will be plenty of room around the mold to allow for uniform heating and cooling. In read more

What is investment?

Investment is a mixture of materials used to make a mold. In general investment mixes for kilncasting glass are composed of three basic ingredients a binder a refractory and modifiers. Some artists use readymade investment mixes like read more

What form of glass do I use for kilncasting?

Different casting methods and desired outcomes will necessitate different forms of glass.  For example if working in the pate de verre method you will want to use frits and powders.  Whereas when working in the box casting method read more

What firing schedule do I use for casting?

As with nearly all kilnforming projects the answer will vary depending on a number of factors such as the mold you're using the process you're using as well as the glass you're using. For example a pâte de verre firing schedule would read more

What equipment do I need for kilncasting?

At the very least you'll need a kiln kiln furniture and a suitable work surface. The rest depends entirely on the scale and type of casting you plan to do.  Two of the most popular kilncasting processes are box casting and lost wax read more

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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…

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…

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…

Recommended Annealing Cycle for Bullseye Glass

Save time and energy. Anneal thick slabs at 900 degrees. As of June 2009' Bullseye has changed its chart for annealing thick slabs. Specifically' the recommended anneal soak temperature has been lowered from 960°F/516°C to…

Mold Tips: Pyramid Casting

Overview The Pyramid Casting Mold is an easy and fun project for beginner kilncasters.  You’ll learn a variety of concepts integral to kilncasting' including mold preparation' glass loading (feel free to use either…

Frit Tinting

Overview Frit tinting is a technique to create color blends for kilncasting and pâte de verre. The process involves “tinting” or coloring clear glass by adhering colored powder to larger-grained clear frit and firing the…

Annealing Thick Slabs

Fahrenheit VIEW/PRINT Celsius VIEW/PRINT Overview When a piece of hot kiln-glass is returned to room temperature' it cannot be allowed to cool too quickly. If cooled too quickly' the temperature differential throughout…

TipSheet 3: Working Deep

Overview This TipSheet will introduce you to ways to float imagery and color within thick blocks of clear glass. Thick glass castings have resulted historically from pours of furnace glass or by kiln-melting glass…

TipSheet 5: Bullseye Box Casting

Overview This TipSheet describes how to create a reverse-relief cast glass object with the optical clarity of a furnace casting' using plaster/silica design elements in an open-faced mold assembled from vermiculite board and…

TipSheet 8: Basic Lost Wax Kilncasting

Overview Lost wax kilncasting is a versatile method for making glass pieces in almost any form imaginable. The process involves creating a refractory mold around a wax model. The wax is then removed—or…

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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…

Where can I get answers to frequently asked customer service and sales questions?

For frequently asked customer service and/or sales questions, please visit the Customer Service/Sales FAQ section in our online store.  If you don't see the answer to your question there, please give our sales department a call…

How big are the individual granules of frit? If applying Bullseye frit with a sifter, what size mesh screen will I need?

Bullseye frit granules come in five sizes: extra large (available in clear only), coarse, medium, fine, and powder. We recommend applying frit with a sifter, as there are a number of interesting effects that can be…

What is Bullseye's glass coding system?

Every piece of Bullseye glass you buy is named with a precise code. The code provides information including color, texture, treatment, thickness and form or shape. Download the Bullseye Glass Coding System PDF FAQs Return to…

Is Bullseye glass COE 90?

Unfortunately, the answer to this question is not simple.  The intent of most glass fusers who ask this question is to find out if Bullseye glass is compatible with glass made by another manufacturer. But COE ("coeffecient of…

What are "striking" glass colors?

  Some Bullseye glasses appear pale or colorless in the cold sheet form, but “strike” or mature to a much different color when fired. Striking colors can vary, depending on temperature, atmosphere, and heat history. Producing…

Is Bullseye glass compatible in all conditions?

When kilnforming, there are a multitude of variables to keep in mind. If you plan to subject Bullseye glass to unusual working conditions, we always recommend conducting your own tests. Under normal working conditions, Bullseye…

What should I know about studio safety?

Here are are some general guidelines to avoid injury while working in the kiln-glass studio. For more information, see Safety in the Kiln-Glass Studio. When working in a kiln-glass studio, cuts will happen, but they are…

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