Project Step 3: Fire

Stack the glass so that the blasted surfaces are placed against each other:

Irid-on-Irid technique

Align the edges:

Irid-on-Irid technique

Full fuse the glass on a shelf using only shelf primer. Do not use any shelf or fiber paper! Shelf paper and fiber paper create carbon when they burn. That fine ash can become trapped in the ground, sandblasted surface. When that happens, the project takes on an unpleasant gray hazing near the edges.

Here’s the firing schedule, using Fahrenheit:

Segment Ramp Target Hold
1 200° F / hr 1225° F 30 minutes
2 FULL 1450° F 20 minutes
3 FULL 950° F 45 minutes
4 100° F / hr 725° F none

Here it is using Celsius:

Segment Ramp Target Hold
1 111° C / hr 663° C 30 minutes
2 FULL 768° C 20 minutes
3 FULL 510° C 45 minutes
4 56° C / hr 385° C none

 

Shelf Paper

Fun project and great tutorial, as usual, Paul.  Thank you for explaining why not to use shelf paper or fiber paper.  So often, the do's and don'ts are included in tutorials, but the whys are left out.  It makes so much more sense with the additional info.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.