Thinking about the thread in another section about the RH Designs paper flasher, I was wondering if this could be used for film. I want to make some cyanotypes of white flowers where it is necessary to hold detail in petals etc., without over darkening the background. Bearing in mind the nature of the process, it will amount to putting a little more contrast in a selective part of the white area. If the negatives were being made by another means, it would amount to tweaking the curve but I am dealing with film here processed by conventional means ! Any recommendations ?