Re: gum mixes
Chris, I'll throw my hat in the ring: Gum is ~30% solution that I make from the very fine powdered gum arabic sold by B&S. Preserved with ~3 ml 1% sodium benzoate per liter. Generally, I mix the gum 1:1 with saturated ammonium dichromate. For shorter scale, I decrease the volume of dichromate or switch to potassium dichromate. I expose with a UV-tube box. Exposures vary widely depending on the neg, which color(s), which layers, etc. I coat with foam roller brushes. My gum work is (almost) always 1, 2 or 3 layers on top of a pt/pd print. I use the same neg for the pt/pd as for the gum layers. Kerik http://www.kerik.com -------------------------------------------------------------------- mail2web.com - Microsoft® Exchange solutions from a leading provider - http://link.mail2web.com/Business/Exchange |