What the Fog!
Doing collodion works, I believe all will encounter foggy plates at some point of their plate session.
I had an extremely frustrating weeks (plural) of foggy plates.
Plate after plate, many batch of developers made, and many sessions of sunning the AgNO3; the fog were only decreased and gained. It seems to not let up and I burned a lot of my acrylic plates (a reminder for me not to use these substrates if I ran into more chemical troubles).
I had run various tests whether if the environment, lighting, my gears, etc. but none of it in any way seems to solve this problem.
Then I pulled out Scully & Osterman’s manual and refer to their troubleshooting section. Their written advise to deal with fogs was to check the environment & any physical structures first before dealing with chemistries.
Hmmm, I had tested blank samples with foggy results.
Which I suspect (least suspected as it took me this long to figure out) the only consistent environment was my safelight!
Now that’s a shocker! I would not have thought of it as it was damn dim in my small darkroom.
This baffling “problem” seemed to go away soon as I worked entirely in the dark (last I worked like this was me developing colour film sheets).
The plate produced was a clean development, which I am happy to work with (for now…)