How to replenishe black & white chemistry

Developers and fix need to be replenished after each use. Replenishment rates are calculated by the quantity of film processed.

For reference:

Small tank can fit 8-10 meters of film: you need to replenish 125ml of developer and 60ml of fix.
Medium tank can fit 15 meters of film: you need to replenish 250ml of developer and 125ml of fix.
Large tank can fit 30 meters of film: you need to replenish 500ml of developer and 250ml of fix.

For each meter of film: you need to replenish 16ml of developer and 8ml of fix.

Steps for replenishing:

1. Take the replenisher developer/fix from the fridge.

2. Pour the required amount of replenisher developer/fix into a 2 litres’ measuring cup.

3. Pour the used developer/fix into the 2 litres’ measuring cup until it completes exactly 2 litres.

4. Put the leftover developer/fix into the Batch B chemistry. If Batch B is full, transfer its contents to Batch C. 
If Batch C is also full, pour the excess into the designated recycle chemistry container. 
You can find the recycling container on the floor next to the metal shelf in big room 1.

5. Label the replenishment date on the developer/fix bottles.

6. Make sure you fill in this form :)

Note: if you don’t feel comfortable replenishing chemistry by yourself, please come to the lab when Esther is available.

You can find the empty form here:

File:Black and white FORM - A3.pdf