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What is the difference between single-rolled and double-rolled sheet glass?

 "Side-by-side of single and double-rolled sheet glass front and back" The Difference Between Single-rolled and Double-rolled Sheet Glass As you might guess based on their names the difference between single-rolled and double-rolled 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

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

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ZYP Tips

Download the ZYP Tips for Ceramic Casting Molds PDF ZYP Boron Nitride Aerosol Lubricoat (8714) is a separator that can be applied to ceramic casting molds as a release between the mold and glass. It can be very effective and…

Bullseye Investment Mixing Instructions

Download the Bullseye Investment Mixing Instructions PDF Safety First Mix in a well-ventilated area while wearing a NIOSH-approved respirator. Mixing Steps Determine how much investment material you will need for your…

Bubble Population

Download the Bubble Population PDF Why Does My Transparent Glass Seem to Turn White' Bubbles affect light transmission in transparent kiln-glass. As a result' the more bubbles your glass contains (i.e.' the higher its…

Bullseye Glass Color Conversion Chart

Bullseye Glass styles conveniently converted to CMYK and RGB color values to streamline your work flow and help you visualize your designs before you make a single cut. Download the Bullseye Glass Color Conversion Chart here (updated…

Murakami SP-9500 Diazo Sensitizer Mixing Instructions

Overview Murakami's premier dual cure graphic emulsion. Outstanding resolution of fine details. An easy to use emulsion with wide latitude and exceptional durability. For instructions' download our Diazo Mixing Instructions…

Pre-Firing Your New Kiln

Overview Before using a new kiln for glass projects' you will need to pre-fire it. This burns out binders' moisture' and other residue left over from the manufacturing process. Read and download the PDF file' Pre-Firing…

Mold Tips: Heart Casting Mold (8976)

More Information Mold Tips' Heart Casting Mold (8976) PDF Helpful Resources Frit tinting articleFrit tinting videoMold Tips' Suggested Slumping SchedulesTips for Using Bullseye Slumping Molds Featured Products Heart…

Working with Accu-Cast 880 Blue

Overview Accu-Cast 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: 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…

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…

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What is the difference between single-rolled and double-rolled sheet glass?

 "Side-by-side of single and double-rolled sheet glass, front and back" The Difference Between Single-rolled and Double-rolled Sheet Glass As you might guess based on their names, the difference between single-rolled and…

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…

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