Ok Sandy, I read your chapter in Comming into Focus about Carbon printing. So I tried to make the pigment tissue, well actually I had some 12x20 fil UPS messed up and I just removed the gelating and tried to use that as backing. Now my question is, how thick should be the gelatin? I used a 10% Knox gelatin solution with 4 ml of glycerin and about 4 grams of watercolor pigment. Well, the darn thing ran all over the place, it was like trying to coat with water..lol...even my dog got gelatin on her hair.... I know it probably is hard to explain in words, but do you have a method to know how thick should I make the solution, should I try a 20%solution when using knox?