Just a basic question about selenium toning to compensate for difficult to print negs.. There have been a number of references to this in several recent threads.(posted 8399 days ago)Could anyone provide a summary of the circumstances when you'd use this? With negs that have been over-developed (or over-exposed) or under-developed (or under-exposed)? Are there any side-effects or downsides to doing it?
What would be the best techniques?
Many thanks!