determining weight of dry ingredients v. water in a glaze
Is this the correct mathematical procedure? I got it from this (rather confusing) thread: http://www.potters.org/subject72185.htm and it seems to work.
I want to add, say, 3% of an oxide to a glaze that's already made. In order to know how many grams to add, I need to do this:
1. 100/Specific Gravity 100/145 = 0.6896 (or 69% water)
2. Weight of glaze batch, say, 350 grams X % water 350 X 0.6896 = 241 grams of water
3. Weight of glaze batch - weight of w
Is this the correct mathematical procedure? I got it from this (rather confusing) thread: http://www.potters.org/subject72185.htm and it seems to work.
I want to add, say, 3% of an oxide to a glaze that's already made. In order to know how many grams to add, I need to do this:
1. 100/Specific Gravity 100/145 = 0.6896 (or 69% water)
2. Weight of glaze batch, say, 350 grams X % water 350 X 0.6896 = 241 grams of water
3. Weight of glaze batch - weight of w