The Dictionary Of Photography

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

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Collodio-Chloride Printing out Paper B.
Strontium chloride......... ... 2 parts.
Alcohol (weak or ordinary)          ...... 100 M
C.
Citric acid ............... 2 parts.
Alcohol         ............... 100 ,,
D.
Pyroxylin ...............        4 parts.
Ether ...............     100 ..
Alcohol (strong or absolute) ... ...     100 ..
To make the emulsion take of
Solution D....... ... ... ... 100 parts.
C................ 10
B.......... '...... 10
Mix well and add gradually, with constant shaking,
Solution A............... 5 parts.
The emulsion should be allowed to stand three days. The following is the one which has given us the best results.
Geldmacher's Formula (modified). A.
r • Schering's Celloidin ... ... ...      20 parts.
Ether ... ... ... ... ...    400 ,,
Alcohol ...............    400 ,,
Castor oil ...............        4 ..
B.
Silver nitrate           ... ... ... ...      20parts.
Distilled water         ... ... ... ...      20 ,,
Alcohol          ...............      50 ,,
C.
Citric acid ... ... ... ... ... 5 parts.
Alcohol          ............... 70 ,,
D.
Lithium Chloride ... ... ... ...      25 parts.
Strontium Chloride............     2*5 ..
Alcohol         ...............      70 ..
Mix solutions C and D and add gradually to the collodion, and
145.                                    L