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Solution B.
Water ............... 20 ozs.
Soda crystals ... ... ... ... 2 ,,
Solution C.
Water ............... 20 ozs.
Sodium sulphite, cryst, pure ...... 4 ,,
Results similar to pyro may be obtained with
Solution A............... 10 parts.
B............ 6 - 10 ..
Water ............... 70 ,,
Bromide (1 : 10) ............ 3 ,, |
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But this formula may be considerably modified, according to requirements; it is not, however, advisable to increase the quantity of alkali, for fear of inducing fog. For over-exposed plates, add the solution B in the above formula little by little, until the desired effect is obtained, never exceeding the amount above prescribed. Images of a softer character are obtained as follows: |
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This solution remains colourless for a long time in full and air-tight vessels. When opened it changes from yellow to red, which, however, does not affect the developing power, or colora-tion of plates.
For use take -
Solution D ... ......... ... 5 parts.
Water............ 50 - 70 ..
Solution C............ 20 - 30 ,,
Bromide (1 : 10) ............ i£ ,,
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