Dr. Beers Variable Contrast "Developing Out" Paper Developer

[Kino]

Kino submitted a new resource:

(there was a url link here which no longer exists) - Dr. Beers Variable Contrast "Developing Out" Paper Developer

Dr. Roland F. Beers give directions for stock solutions of a developer which may be combined in different proportions so that it will provide a progressive range of contrasts.

Solution A
Metol 8 grams
Sodium Sulphite 23 grams
Potassium Carbonate 20 grams
Potassium Bromide 1.1 grams
Water to make 1000 cc

Solution B
Hydroquinone 8 grams
Sodium Sulphite 23 grams
Potassium Carbonate 27 grams
Potassium Bromide 2.2 grams
Water to make 1000 cc

To obtain varying contrasts, combine...

(there was a url link here which no longer exists)

 

[Dwane]

Beer’s developer formula is given in “parts”, whatever a “part” is. Note that each solution ends up being made up of 16 “parts”. If 16 “parts” is the same as 1000 mls (a liter), then one “part” is equivalent to 62.5 mls. I used this conversion factor to convert the “parts” to mls, and rounded the results, so that you end up with 1000 mls (a liter) of working solution. If you need more or less, than it’s easy to convert to what you need. Here is the table, with “parts” replaced with mls. Hope this helps.


1 2 3 4 5 6 7

500 440 375 310 250 190 125 < -- A

0 60 125 190 250 310 875 < -- B

500 500 500 500 500 500 0 < -- water