[alt-photo] casein odd process
zphoto at montana.net
Wed Aug 31 13:44:38 GMT 2011
Since you asked....
In searching for casein (still) the one formula I came across a patent for: 5g of anhydrous casein, 75 ml water, 2 ml ammonia, and 2.5 g ferric ammonium citrate (FAC). Brushed on paper.
I have found continually that casein cannot be mixed with metallic salts because they will, what is the term, "throw down" and insolubilize. This is one advantage I see in gum is the ability to mix stock pigment solutions with no hardening.
Christina Z. Anderson
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