Here is my paper wash test.
Normal process, Dev, Stop, Fix, wash.
Fix = KRLF (Kodak Rapid Liquid Fix), Paper dilution, recommended time.
Paper = Ilford MG IV FB
Conditions = Runnin water, single sheet, 5x7 tray with 4x5 sheet.
When fresh, all of these looked equally white. They are now 5 years old. The retained Silver test is on the left and the retained hypo test is on the right. The test on the right (retained hypo) has darkened with age being Silver Nitrate. It required 2 - 4 minutes for complete washing to yield no change in stain with keeping. I ran that test as well, shown in the second figure. It is the only sheet that has shown no appreciable stain growth in the intervening 5 years. I'll let you know more in 5 years.
Please note that the retained Silver is still slightly positive, and the retained hypo is positive at 2 and 4 minutes, but since it darkens with age it is hard to tell now. However the paper still looks good! So, you can be fooled.
I have the same test with RC paper. It tells a totally different story!
Last edited by Photo Engineer; 11-23-2010 at 01:50 PM. Click to view previous post history.
Reason: Error in the text reversing tests. Sorry