Sam Tomich on sun 29 oct 06
John Conrad=B9s Black Engobe for ^6 from Lana Wilson=B9s Glaze Page
Kentucky Ball 20
Potash Feldspar 15
Borax or soda wash 5
Neph Sy 10
Black Mason Stain 6600 10-12
For cone 6 add neph sy 5-20% to make it more vitreous
For mason stains pinks and purples I need calcium in the base. Is there
enough whiting in this or should I add more, and how would that effect the
rest of the base?
I want the engobe to be velvety or chalky looking but not brush off. How
much neph sy should I use to start with for testing? Would this be a good
case for a line blend? And then what would the line blend be exactly?
I want to use the base wet and mix in dry measures of mason stains, say for
instance, one cup of base and a quarter teaspoon of mason stain. What would
be a good starting point?
TIA, very much,
Sammy in Hawaii