Film Photography : Black and White Paper Reversal

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 then  the shutter speed now is 0.6 second and  photo 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

  1. Process for 1 minute
  2. Wash for 1 minute
  3. Bleach for 5 minutes
  4. Wash for a minute
  5. Expose for maybe 30 seconds under a normal light or natural light
  6. Fix for a minutes
  7. 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