[alt-photo] casein odd process

[Christina Anderson]

Keith,

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.
Chris


Christina Z. Anderson
christinaZanderson.com