Here’s a video from Tom Johnston on how to test black and white paper for Fog… and Fix it. I’ve had several of his videos on this site before. Always excellent information with excellent quality.
In this video, he shows the results of his extensive tests, how he tracks his paper and his tests, how to mix chemicals to clear the fog, and how to summarize the data.
This is an excellent video to see the methods of an accomplished photographer and printer. See Tom’s photography at http://tjohnstonphoto.com/
