Robert C. McColloch
16-Jan-2005, 15:06
There must be some very knowledgeable photo formula compounders out there that understand the chemistry and reasons why we are instructed to follow certain procedures. I have two questions”
1 After bleaching a print (local or otherwise), why do the instructions say to periodically remove the print from the bleaching process and insert in fixer (typically 30-60 seconds)(they are usually talking about a typical acid fixer)?
2
Same question but regarding use of and alkaline fixer?
I guess my problem is that I don’t really understand the chemistry of the process. If someone could explain, it would be of intellectual interest to me.
Thanks in advance.
1 After bleaching a print (local or otherwise), why do the instructions say to periodically remove the print from the bleaching process and insert in fixer (typically 30-60 seconds)(they are usually talking about a typical acid fixer)?
2
Same question but regarding use of and alkaline fixer?
I guess my problem is that I don’t really understand the chemistry of the process. If someone could explain, it would be of intellectual interest to me.
Thanks in advance.