The Dictionary Of Photography

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

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Gelatino-Chloride
B.
Sodium citrate............      3o grs-
Gelatine ...............    ioo ,,
Distilled water ............ ozs.
Soak for an hour, dissolve by heat, and add
Nitrate of silver ......... ...      45 grs.
Citric acid...............      80 ,,
Distilled water ... ... ... ... oz.
Mix both emulsions. Allow to set, and wash as directed for No. II. emulsion. The same authority also suggests the following formulae and method of mixing the same: -
Formula No. I.
A.   Nitrate of silver ............    400 grs.
Water ...... ... ......        4 ozs.
B.   Gelatine, soft ............      80 grs
Chloride of ammonium ... ... ...      80 ,,
Citric acid...............     120 ,,
Water ...... ■.........        8 ozs.
Formula No. 2.
A.   Nitrate of silver ............    400 grs.
Water ...............        4 ozs.
B.   Gelatine (soft) ............      80 grs.
Chloride of ammonium ... ... ...      80 ,,
Citric acid ...............     120 ,,
Carbonate of soda (dry).........      45 ..
Water ...............        8 ozs.
Formula No. 3.
A.   Nitrate of silver ......... ...    400 grs.
Water ...............        4 ozs.
B.   Gelatine (soft) ............      80 grs.
Chloride of ammonium ... ... ...      80 ,,
Citric acid ... ... ... ... ...      60 ,,
Carbonate of soda (dry) ... ......      80 ..
Water ...............        8 ozs.
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