Potters & Sculptors - Making Rock from Mud
G200Changes.pdf You will have to change all your recipes when existing stocks run out. Currently a potash spar is mixed 70:30 with a soda spar. The new formulation will just contain the potash spar. Read the linked pdf from Standard Ceramic Supply.
An introduction to ceramic materials and how they combine in different proportions to form either glazes or clay bodies.
Charts of materials composition to aid glaze formulation and modifications.
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