I've had problems the past week whist printing with my Fujimoto CP-31 and Durst M707 enlarger. Basically I can't get a 'clean' image. There is always a cast. Its either magenta, or green. There seems to be no clean whites inbetween! What I've tried.......... -Spending ages in the darkroom trying to filter the casts away. -New chemicals twice -extremely thorough cleaning of the printer -checked that the enlarger's filters are moving ok -checked for light pollution (none, I don't even use a safelight) -There is no fogging on unexposed areas of paper either, only casts on teh exposed areas. -different batches of paper I'm at the end of my tether!!! Help!