Cooling rate drastically affects the appearance of this glaze

Saturday 23rd November 2019

This is G2934Y satin matte with Mason 6600 black stain. The piece on the left was fired using a slow-cool firing schedule (C6DHSC). The schedule for the one on the right turned the kiln off at 2100F (after a half hour drop-from-2200F-and-hold), then it free-fell. The slow cool gives the glaze on the left time to crystallize, thus it is now a stony matte (rather than a satin matte). It is interesting that to this mix of the glaze I added 20% glossy clear, yet it still matted on the slow cool.

Pages that reference this post in the Digitalfire Reference Library:

G2934Y - Cone 6 Magnesia Matte Low LOI Version, A gunmetal glaze I have wanted for decades!, Matte Glaze

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