testing darkness

david1701

david1701

Messages
10,870
Name
David
Edit My Images
No
Hi all,

How do I test to see if a room is dark enough for loading tanks?

I know you test for printing buy leaving a sheet of paper half covered for a while and then deving it, but this is basically a cupboard that I want to load my tanks in (and I have no paper chems atm only slide)

Should I just try it with a film I could cope with losing?

Cheers,
David
 
Usual test was to go in the room, sit in there with the lights out and your eyes shut. Sit there for 10 minutes, then open your eyes - if you could see anything, the room wasn't light tight - at least for colour. For loading film into developing tanks, my loft's plenty dark enough, but it wouldn't pass the 10 minute test. It's certainly dark enough that you can't see your hands moving in front of your face for as long as it takes to load 4 rolls of 35mm film into spools and place them into a patterson tank though :LOL:
 
Another quick test is to put 10p on a piece of photographic paper for 30mins and then develop the paper. If you couldn't see where the 10p had been then you were fine and room was light-tight.
 
How big is your tank? Why not use a changing bag?
 
You must log in or register to reply here.
Back
Top