Quote Originally Posted by CBG View Post
Can you elaborate? I would have got it all wrong, and thought bleaching and redeveloping would have kept the same contrast or lowered it. I'm missing something.

Not necessarily. Both the redeveloper and the bleach bring properies to the table. Consider for example FSA using different bleaches based on bromide, chloride or iodide. Redevelops to colloidal silver. Not only does the colour change to a wide range of options, but the print density can be increased by up to a couple of stops and contrast can change significantly. Many redeveloping toners shift contrast using other metals, iron blue for example, perhaps the best know contrast increasing, but others have their own effects.