Back to your original post I'm very surprised that you had any chemicals left in the paper, in 45 years of printing I've never seen what you are describing.
As I said the chemicals used in wash aids / HCA are extremely soluble in water and wash out very easily.
Only two things spring to mind, first the prints aren't being washed properly, maybe they are sticking together, or you have exceptionally hard water. I'm more inclined to go for the latter explanation.
Oh I put a date on the washing in sea-water, perhaps I shouldn't have assumed WW2 :-)
Originally Posted by RalphLambrecht