The amount of KBr is crucial for both avoiding fog and accutance of the photos. Also the developing time is considerably influenced by this amount. I have been using 1 g/liter of KBr but today I decided to use just 0,5g/liter to have a decent development time of less than one hour.
I am still waiting for the film to be fixed with common salt (sodium chloride) because the ammonium thiosulfate is producing strange white spots (black in negative). Salt fixing takes a long time, some hours depending on temperature and concentration. The film is now clear after 3 hours but needs 3 hours more to be considered fixed. I hope I can show the results of Caffenol Strong + Salt in the next post.