Substractive bleach for overexposed or fogged film.

Substractive…

Prepare stock solutions as described below:

Finally, prepare working solution as specified below:

1. Soak the film in water.
2. Put the wet film in a tray of working solution, agitate carefully.
3. Inspect and remove film from tray as soon as density is sufficiently dense, or slightly before.
4. Apply a quick rinse in water to abort further bleaching.
5. Inspect and repeat if needed.

Mix 10-14 parts of water with 1 part of A and 1 part of B.

For a weaker solution, keep proportion of part A and part B and dilute in more water.