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Irid up, small lumps

For discussion of processes related to using Bullseye glass, including kilnforming and kilncasting, torchwork, blowing and stained glass.

Irid up, small lumps

Postby aeshep3 » Wed Oct 21, 2020 12:55 pm

Looking for help in determining why
small lumps formed under irid fired up, details and pics follow:

Gold irid on black, alchemy glass and silver on tekta base

4 Squares, nearly identical, approx 8", lumps in all, evenly spaced filling shelf

Olympic clamshell, side with optional top firing 1-10 setting, set to 5

Trusted firing schedule pic attached

1) What kind of kiln shelf are you using?
18" kiln washed fiber on floor
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aeshep3
 
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