The Dictionary Of Photography

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

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Development and Developers
hand, increase the proportion of A, and, in  extreme cases, add bromides. For example : -
Solution A        ...        ...        ...        ...        ... 2 parts.
.. B        ............        ... i part.
or,
Solution A        ...        ...        ...        ...        ... lO parts.
ยป       B         ...............5 H
Potassium bromide, IO per cent, solution ... I part.
The Imogen-Sulphite Developer.
A.
Imogen-sulphite          ...        ...        ... 25 grams (one package).
B.
Saturated solution of ordinary washing soda. For use mix
A.            ... ... ... ... ... ... 2 vols.
B.           .................1 vol.
From 2 to 3 drops of 10 per cent, potassium bromide solution to each ounce may be necessary to ensure clearness. For under-exposure use no bromide, and dilute the developer with one-third of its volume of water. In case of over-exposure from 5 to 10 drops of bromide solution may be used to each ounce.
The Metol Developer. This is said to allow of shorter exposures than other developers, and the image appears very rapidly.
Concentrated Single Solution.
Dissolve in
and then in succession
For use, this solution, which keeps well, is to be diluted with about 3 times its volume of water.
If soft negatives be desired, take less potassium carbonate (for example, only 231 grs.), and also less or even no potassium bromide.
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