George Collier
Subscriber
A friend is doing a project which involves coating a varnished surface with Liquid Light, then contact printing (with large negs) an image onto the emulsion. There are times when he would like to remove the finished image and re-coat and re-expose. He is using warm water and not being thorough, although he doesn't see the remaining original emulsion until he has re-coated and is developing the second image. I'm suggesting that he use a strong alkaline solution to remove the first coated image. What would be a good one, in warm water, that would not be toxic to him? Sodium Carbonate?