Michael: thanks, would you post the recipe for mixing these to make the PO?

Sandy, I read the article on clearing, but the second part totally lost me! Can you help me with the second part of the clearing test? It seems there are some steps missing that are implicit for the more experienced. My current processing is: 8 minutes development and there already is no stain on the unexposed coating. So I wanted to figure the shortest clearing time to reduce the bleaching in the citric acid.