I remember an article by Ctein in one of the "Techniques" magazines to that effect. While I have a tremendous amount of respect for Ctein, I squinted my eyes reading that one. Seemed *far* more complicated - and less understandable - than what he usually writes.Originally Posted by brimc76
I've been using RC papers since there were RC papers ... and have quite a few framed, under glass ... except for a few that were insufficiently fixed (I dumbly believed the manufacturer's recommendation for 30 seconds of rapid -ammonium thiosulfate - fixing) - I've seen nothing like a "metallic" shift, with or without toning or "Sistan".
I have used Sistan for the last ... ??? ten (?) years. One minute in a tray of - I've got to check the recommendations again - was it 25ml / liter?
*No* change in appearance - none that I can see. The treated prints - from 'way back, with and without glass - are fine.