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Ingredients

Ingredient Amount
Gerstley Borate 8.10
Strontium Carbonate 15.50
Wollastonite 15.50
Nepheline Syenite 39.80
EPK Kaolin 10.30
Silica 10.80
Add Amount
MS 6600 Best Black 3.60
MS 6300 Mazerine 1.20

Instructions

Published in "Following a thread: Matte Glazes at Mid Range," in the November 2015 issue of Ceramics Monthly, page 61.
Mix to a specific gravity of 1.46.