The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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Development and Developers
For quick development, take
No. I. solution...............I part.
No. II. solution... ... ... ... ... I ..
For slow development, take
No. I. solution...............    I part.
No. II. solution... ... ... ... ...    I ,,
Water..................    I ..
Tke Paramidophenol Developer.
A.
Water..................34 ozs.
Paramidophenol          ............308 grs.
B.
Sodium sulphite, cryst.         ...        ...        ...      4 ozs.
Carbonate of potassium         ... ... ...      4 ..
Water..................    68 ..
For use mix
A.            ... ' ............... 1 part.
B.            ... ... ... ... ... ... 2 parts.
The Pyrocatechin Developer. A formula adapted for general use is the following: -
A. Water ... ... ... ... ... ... 35 ozs.
Anhydrous sulphite of soda......... 4 ,,
Pyrocatechin ... ... ... ... ... 1 oz.
B.
Water..................35 ozs.
Carbonate of potassium         ... ... ... 4 to 6 ..
For use mix equal volumes of water, A and B.
The Rodinal Developer.
Rodinal (see Rodinal)          ... ... ... 1 part.
Water ... ... ... ...... ... 25 parts.
In case of over-exposure, use
Rodinal ... ... ... ... ... ... 1 part.
Water ... ... ... ... ... ... 15 to 20 parts.
adding an ample quantity of a solution of potassium bromide (1 : io), and in case of under-exposure, use
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