This post is about black-and-white reversal for paper. We are going to use this expired 5×7 Ilford photo paper . We will need to trim it down for use inside this 4×5 film holder in the darkroom .
We will use a Chamonix 4×5 large format camera to take the shot.
Youtube video
Exposure :
For shooting photo paper as a positive, we need to add 2-3 stops to what the meter is reading.
The light meter is giving a f5.6 aperture and the shutter speed now is 0.6 second . For photo paper if we are using it as a positive we probably need to overexpose it by 2-3 stops
Chemicals
First Developer : the Ilford multigrade developer (1+9)
Bleach : Part A – 1 g of potassium permanganate and add up to 250 ml water
Part B – 13.5g of sodium bisulfate and add up to 250 ml of water.
This will mix up to
Only mix the 2 parts to form the bleach when we are ready to use as this potassium permanganate based bleach does not keep well. Remember we always ADD ACID to Water so Always add the part B (which is a diluted sulphuric acid) to part A.
Second Developer : Reuse the Ilford multigrade developer used in first Developer
Fixer : Ilford Rapid Fixer
Processing steps
Based on Ilford Multigrade RC paper
- Process for 1 minute
- Wash for 1 minute
- Bleach for 5 minutes
- Wash for a minute
- Expose for maybe 30 seconds under a normal light or natural light
- Fix for a minutes
- Final wash for a minute
Sources for materials
1. Ilford Multigrade RC paper – https://amzn.to/3dOII33
2. Ilford Multigrade Paper Developer – https://amzn.to/365Oivt
3. Potassium Permanganate – https://amzn.to/2TcVIYF or if you are in Singapore, you can get them from pharmacies like Watson, Guardian , Unity 4. Sodim Bisulfate (PH Reducer) – something like this can be used https://amzn.to/2WACBK9 or source out at your local swimming pool maintenance companies
5. Ilford Rapid Fixer – https://amzn.to/2WACBK9 or source out at your local swimming pool maintenance companies