I'm printing on Arches 140-pound hot press watercolour, which I really want to work because I can buy sheets of it here where I live at decent price. From what I've read elsewhere, the Arches hot presses seem to work well for others. After I expose the Van Dyke print, I wash it in the first water batch with a little citric acid added (about two minutes), then it goes into the fix, which is 30 grams of hypo crystal in 1000 ml of water. In the fix, the print goes deep brown, but within a few seconds, the density starts to bleed out of the deep shadow areas. I can literally watch little streams of brown flowing out of the shadows. Within a minute, the print has lost the initial richness and is weak and lacking density . . I must be doing something wrong. Suggestions?