

This was a test done with frit. The left was applied "dry" with no medium to hold it. The right was applied "wet" with a medium of water mixed in with some gum arabic.
Other test pieces done at the same time. (not shown)
Desired result was that the baking powder or baking soda will bubble (as with baking).
Test 2 pc clear with dry baking powder in between
Test 2 pc clear with wet baking powder in between
Test 2 pc clear with dry baking soda in between
Test 2 pc clear with wet baking soda in between.
Wet medium was a 50/50 solution of water/gum arabic.
Results not shown-where the baking soda and baking powder were applied thickly, the powder didn't burn off and a white clump stayed-not at all attractive. The wet and dry methods had a different appearance when fused.
Where the powder went on VERY LIGHTLY, the baking powder and baking soda burned off and left bubbles. The light application was towards the outside so the burning off of the powder could have been affected by this. Must do another test piece where the whole application of powder or soda is a light film.
There didn't seem to be a difference of results between the baking powder or baking soda.
FUSING SCH
Starting temp 85 deg.
Turn kiln on Lo
At 45 min, temp = 520 deg.
Turn up to Level 2
At 1 hr 39 min, temp = 845 deg
Turn up to Level 3
At 2 hr 27 min,, temp = 1090 deg
Hold at this temp for 10 minutes. Played with control to keep kiln at this consistant temp.
After 10 minutes, keep at Level 3 and let temp rise.
At 3 hr 45 min, temp at 1450 deg.
Hold for 10 min.
At 3 hr 55 min, turned off kiln and let cool overnight.