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Do I have to dry my casting mold in the kiln?

Yes it is important to remove as much moisture as possible from your casting mold. To learn more read the "Firing the Mold and Glass" section in TipSheet 8 Lost Wax Kilncasting. read more

Do glass colors change in kilncasting?

Color can change depending on a variety of factors.  (For example the thickness of the glass and the amount of time spent at casting temperatures).  Some Bullseye glasses mainly the 001100 series and 001400 series are so saturated read more

How do I make pâte de verre?

Pâte de verre is a kilncasting method that literally means "paste of glass".  The general premise is to mix frit granules with some sort of binder such as gum arabic then apply the glass to the inner surface of a negative mold. Pâte read more

Can I firepolish my casting?

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. If your piece is flat rather than upright you may be able to firepolish it. Since firepolishing read more

Can I cast glass in Bullseye slumping molds?

Yes. Remember to re-apply shelf primer after each firing and review our Tips for Using Bullseye Slumping Molds. Related Questions Can I cast glass together with clayCan I make a reusable kilncasting moldHow large can my casting beWhat read more

Can I cast glass together with clay?

Normally ceramic clay and glass are not compatible materials. Theoretically however it may be possible to devise a clay that is compatible with Bullseye glass. At this time we don't know of anyone who has achieved such a clay. There are read more

How do I get rid of sharp edges on my project?

There are many ways to remove sharp edges from your project.  You will need to assess your project and the type of edges you're dealing with and decide which tools and processes are best. Tools may include anything from simple hand read more

How do I coldwork my kilncast piece?

What kind of piece is it and what are you trying to accomplish in coldworking it 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 read more

Can I sandblast glass to remove devit?

Yes.  And it is a good idea to fully remove devitrification either by sandblasting and/or grinding as soon as you notice it to stave off further growth. After you have sandblasted away the devitrification clean the glass with compressed read more

Besides sandblasting, how can I remove devit?

If your glass is flat you can sift a very thin layer of Clear powder (about 2 grains thick) over the entire piece and fire it to 1425°F (774°C) - 1450°F (788°C) for about ten minutes depending on your kiln.  This should remove read more

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Suggested Slumping Schedules

Over the years' Bullseye's Research & Education department has gathered a vast amount of experience slumping glass in a wide variety of molds. We've collected this information into a handy new reference guide and' in keeping…

Clean Shield Gel

  When properly applied' Clean Shield Gel (8224) brings out luster and gives dry' matte surfaces the sealed appearance of a low-temperature firepolish. (Unfired' unsealed sandblasted surfaces have a "dry" appearance that can…

Color Line Paints & Pens Product Information

Overview Color Line Paints & Pens are ready to use enamels for glass or ceramics in a fantastic range of intense colours. Available in squeeze bottles for use as lining pens or in larger units for painting' airbrushing'…

Prefiring Your New Kiln

  Before using a new kiln for glass projects' you'll need to pre-fire it. This burns out binders' moisture' and other residue left over from the manufacturing process. New shelves can be slow to take on primer so we recommend…

Gold-Bearing Pink Tints

Samples of Ruby Red Tint (001824-0030-F) from various production dates. To consistently reach target color when firing our gold-bearing striking glasses' Bullseye advises a pre-rapid heat soak of 2 hours at 1225°F (663°C) on…

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 artwork. You 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 Making this deep bowl form is easy as 1-2-3.  Each consecutive firing shapes the form' ultimately resulting in a deep' tall' steep-sided vessel. Download our Mold Tips' Deep Form PDF for some tips to maximize…

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BECon 2013: Sandra Gross

Gross presented this lecture on Saturday, June 22, 2013 in Portland as part of BECon 2013: CHROMA-CULTURE. Transformations: Color, Kiln-Glass & Children's Education What can we learn as artists and educators in observing children…

BECon 2013: Richard Speer

Speer presented this lecture on Thursday June 20, 2013 in Portland as part of BECon 2013: CHROMA-CULTURE. Angel White and Devil Red: Color's Symbolism in History, Pop Culture, and Contemporary Glass "Color," wrote the late painte…

BECon 2013: Bullseye Color Stories

This panel discussion took place on Friday June 22, 2013 in Portland as part of BECon 2013: CHROMA-CULTURE. Bullseye Color Stories Panel: Dan Schwoerer, Sam Andreakos, and Ted Sawyer Moderator: Mary Kay Nitchie Where does Bull…

Day of the Dead Skulls

Pâte de Verre is a casting method that involves hand-packing layers of frit and powder in a refractory mold. The term literally means “paste of glass” in French. Works made with this technique take many forms. These include thin-w…

Screen Printing: Screen Setup & Care

Screen printing is a time-honored method of image production dating back hundreds of years. Both flexible and cost-effective, it has been successfully adapted to a variety of media for use in commercial, fine art, and pop-culture setti…

Bringing Home Your New Kiln

Many artists assume they need to rent a dedicated space to work on kiln-glass projects. But you can accomplish a lot in a home studio with just a kiln, a table or bench, and some basic tools.In this lesson, we'll set up a home studio a…

Clear Powder on Iridescent Sheet Glass

One simple yet powerful design tool available to kilnformers is the addition of clear powder to iridescent sheet glass. The grains of powder alter the reflective qualities of the iridescent coating, making a range of metallic effects p…

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 …

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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 achieved. Bullseye…

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

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. For projects…

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 can I expect from Bullseye rods?

Bullseye rods are an accessory glass that can be added to kilnforming projects to create a variety of unique design elements. In the production of Bullseye rods, five characteristics are evaluated: Compatibility: Bullseye…

Is Bullseye glass food safe?

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

How and why should I clean glass before firing it?

Glass should always be cleaned before it is fired in a kiln. Cleaning glass removes problem-causing contaminants like glass-cutting fluid, oils, minerals, salts, dusts, fibers, sticker residues, pen marks, and fingerprints. These…

What is coldworking?

Coldworking, as it sounds, 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…

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 taking a class to learn about the different types of coldworking equipment and supplies that are…

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