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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: On the Edge with Transparents

Transparents transform with on-edge strip construction Cut 3mm sheet glass into 1cm wide strips' turn those on edge' and—presto!—color saturation increases. In the pairings below' notice how the 1cm thick on-edge samples…

Quick Tip: Fritfetti

Say yes to sprinkles! Steps (4 firings) Make frit balls with Medium Frit. See Quick Tip' Frit Balls. Cut 7” (approx. 18cm) circles. You’ll need 3 circles of Clear and one of each opalescent style to make the…

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…

Quick Tip: Little Wisp Bowls

Create your own streaky color palette. Layer Clear and White Streaky sheet glass over transparent tint glass styles. Slump in the Cone Bowl mold to upturn the edges and achieve luscious color at the rim. We’re making bowls…

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: Opaline Overlays

Style codes for glasses above' White (000113-0030)' Driftwood Gray (000132-0030)' Elephant Gray (000206-0030)' Deco Gray (000136-0030)' Slate Gray (000236-0030)' Black (000100-0030)   Opaline sheet glass. Amazing…

Using Fusible Decal Paper to Transfer Laser Printed Images

Overview With this paper you can make a decal out of any image that you can print on a laser printer' including letters' numbers' line art' graphics' or even photographs. A black and white photograph that has good contrast as…

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…

What size French Cleat do I need?

Overview Once you know the total weight of your piece' use this chart to select the right cleat(s). For more tips' download our What size French Cleat do I need' PDF.  More Information What size French Cleat do I…

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…

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How do I prevent suckers?

In kilncasting, "suckers" are unsightly depressions or wrinkles that can pop up during the cooling process. Suckers get their name because they appear to have been sucked in from the form of the mold. Suckers are the result of…

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…

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…

Do you have projects that teach about kilncasting?

You can get some ideas and basic information from the following articles and video lessons. Articles (FREE) TipSheet 5: Bullseye Box Casting  TipSheet 8: Basic Lost Wax Kilncasting Video lessons (subscription required…

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