1: Put on safety glasses.
2: Place glass on a clean flat cutting surface with the smooth side of the glass facing towards you.
3: Start on an edge of the glass holding the cutter firmly in one hand. Keep the cutter perpendicular to the glass. Push the cutter gently and evenly across the glass (FIG. 1 ). Decrease pressure slightly as you reach the opposite edge of the glass; lift the cutter off the glass at the end.
4: Breaking the score line can be done with breaking pliers. Hold the glass in one hand, with the score facing up. With the other hand, center of the score line in the jaws of the breaking pliers about a half inch onto the glass surface. Apply pressure to the handles; you will hear a "pop" and the score will run, breaking the glass into two pieces (FIG. 2).
HOT TIP!: Do not rest or move your hands over the cutting surface. Small pieces of glass can remain and will cut you. Obtain more information on cutting glass curves, ovals and circles through online searches, books and classes.
5: After cutting glass to the desired shape, clean and dry with a lint-free cloth (FIG. 3). If using fusing glue to hold your glass project in place, make sure the glue is completely dry before firing.
1: Cut a square of kiln paper to fit the base of the Fuseworks™ Microwave Kiln. Place paper on the kiln base. Kiln paper is only good for one firing.
2: Layer cut glass on top of kiln paper (FIG. 4). Leave at least a 5/8" border around the glass and the edge of the kiln paper. Do not allow the glass to touch the sides of the kiln wall or the base of the kiln. Glass allowed to touch the kiln base or walls will stick and can cause irreparable damage to the kiln during the fusing process.
3: Carefully place kiln base with glass in the center of microwave oven. Place lid on top of the base. WARNING: Never leave microwave or kiln unattended during the firing process.
4: Set temperature for the microwave on high. Choose times for firing from the chart (see images).PLEASE NOTE: Every microwave oven and kiln will vary. The ranges found in the chart below are average ranges. Actual times will vary depending upon your microwave oven, the thickness of glass, as well as your desired results.
HOT TIP: Take good notes! Use the Firing Log to (see log sheet in images) keep important information about fusing projects. This information will help repeat good projects and prevent bad ones.
5: When microwave time has expired, use heat resistant gloves or mitts to carefully open the lid. If your piece is not fused to your liking, return kiln lid and microwave at 30 second intervals until piece is fused. Do not leave the lid off the kiln for extended periods of time during this stage. Never touch the glass. Do not heat for more than 6 minutes.
HOT TIP: HOT glass looks like COLD glass, BE CAREFUL!
6: A good fuse indicator is to watch for a red glow to appear in the hole at the top of the kiln. When it changes to a yellow/orange, this will indicate the glass has entered a full fuse stage. At this stage glass corners will become rounded. When you see more of a yellow glow, the piece should be fully fused.
HOT TIP: To see the glow more readily, cover the microwave light by cutting a small piece of cardboard to cover the light source and tape into place.
1: When desired results have been achieved, using heat resistant gloves, remove the whole kiln from the microwave oven. Set on a heat resistant pad. The area around the Fuseworks™ Microwave Kiln should be free of clutter and in a safe location. Do NOT allow to cool under an overhead cabinet. Never block the opening at the top of the Fuseworks™ Microwave Kiln.
2: Do not remove lid at this time. Removing lid will cause thermal shock, resulting in breakage.
3: Allow your fused piece to anneal for a minimum of 30 minutes without removing kiln lid; time could be longer depending on the thickness of the project. You will be tempted to open the lid and look at your piece but do not, as this can be dangerous and will result in cracked projects.
4: Do not reuse the kiln until it has completely cooled for at least 30 minutes. Continuous use without cooling can cause damage to the kiln.
5: Your fused project must cool completely before removing from the kiln. This can take up to 40-50 minutes. Once cooled, you can remove the fiber paper from the back of the fused project by rubbing the surface with a wet paper towel or cleaning the project under warm water.
Problem: Cracked glass in the kiln during firing.
Solution: Clean and dry glass thoroughly. Make sure glass being used has the same Coefficient of Expansion (COE).
Problem: After glass project cools, fused project cracks
Solution: Cool more slowly. After removing the kiln form the microwave, leave the lid on for at least 30 minutes in an area free of drafts.
Problem: Glass embeds itself into kiln walls or base.
Solution: Use a glass file or fingernail file to remove burs.
Problem: Glass embeds itself into kiln walls or base
Solution: Allow both glass and kiln to cool completely. Use a utility knife to carefully cut and remove glass from the kiln.
Problem: Cracks, blisters and/or loss of interior kiln coating.
Solution: This should not impact the operation of the kiln. If large areas of the coating are damaged and the glass is heating unevenly, a replacement top is recommended.
Problem: Dichroic glass shatters and breaks during fusing.
Solution: This could be the result of heating the glass too rapidly. Try reducing the power of the microwave by 50% for a longer length of time.