No, Bob,
I am describing a darkroom which gets used by 92 students each day, with
each student working in a 45 minute time slot. The room is reasonably
clean, considering. And that wasn't my question.
Thank you all for the great information on the possible processes acting
on prints in the school darkroom. The specific names and issues are
invaluable, and remind me of what the list can do. Now for some
experimenting!
Judith