Quote Originally Posted by daveandiputra View Post
Any pointers or links to read about it?
US 4076772 describes a method of coating gelatin on PMMA (= "plexi"): "A poly(methyl methacrylate) sheet is coated with nitrocellulose, the nitrocellulose is denitrated, and a gelatin solution is applied (...)."
Ammonium sulfide is used for denitration.