March 29th, 2023
Objective:
The objective for this firing is to test various crater glaze colorant combinations, and hopefully finalize them for application testing. Also tested in this firing are (2) “Gloop” glazes - glazes high in silica and alumina that are dried out and applied solid, (2) variations of bronze glazes, (2) ice crackle candidates, various colorant combinations with Strontium Matte (the base for the crater glaze without silicon carbide) [ref. CO-93], (4) crawl glazes, a clear glaze, as well as a Red Iron Oxide wash for refiring a pot, and alone on a tile.
Schedule:
Line 00 | Start |
Line 01 | Time 0:00; Temp 5C |
Line 02 | Time 0:30; Temp 140C |
Line 03 | Time 0:10; Temp 140C |
Line 04 | Time 0:20; Temp 260C |
Line 05 | Oxidation 150 |
Line 06 | Time 1:36; Temp 600C |
Line 07 | Time 1:53; Temp 1052C |
Line 08 | Time 1:38; Temp 1150C |
Line 09 | Time 4:14; 600C |
Line 10 | Cooling |
Line 11 | Stop |
Line 12 | Time 6:00; Temp 50C |
Line 13 | Time 0:00; Temp 0C |
Photos Before:
Photos Before
Photos After:
Photos After
Gas Consumption
Forgot to photograph gas meter after.
Conclusion:
The crater glazes came out wonderfully and I’ll proceed with application testing these. The glossy gloop is also very interesting, though the rough one didn’t move much at all. There’s a lot to play with in the crawls, and Kuan Ice Crackle shows promise of being effective if applied super thickly. One of the bronze glazes was successful, however it ran a ton, though this could be from having them placed in the back left corner, which over fired a ton. The back left corner likely fired to cone 7ish, while the rest of the kiln seems to have fired to roughly the appropriate cone 5. I had to use self standing cone 6’s instead of cone packs with a 5, as we didn’t have any self standing 5s and I didn’t have time to let the cone pack dry.