Hi, sorry but my english is not so good...
If the sensibility of silver chloride is 100, the silver tartrate is about 17.
The organic salts of silver always have a smaller sensibility that the haloid salts , but at a extended exposure the image acquires good intensity.
I´ve tried with no organic acid, mixing only silver nitrate 10% with ammonia ferric citrate 25% , and the exposition times for a more than normal contrasted negative is about 6 minutes, at sun.
guillermo mischkinis
Received on Wed Jan 7 17:44:31 2004
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