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
Collodio-chloride was a very favourite printing process. It gradually fell into disuse, but has lately been revived. Numer-ous formulae have been suggested, but the three following will be found to yield good results : -
Monckhovert s Formula. A. Plain Collodion.
Pyroxyline............... 5 parts.
Ether..................ioo ..
Alcohol         ...............ioo ,,
B.
Magnesium chloride (cryst.)          ... ... I part.
Alcohol         ............... i o parts.
Filter.
C.
Silver nitrate            ............ 2 parts.
Boiling dist. water              ... ... ... 3 ,,
Alcohol         ............... 7 ,,
Dissolve the silver, previously powdered, in the water, then add the alcohol.
D.
Citric acid ... ... ... ... ... 2 parts.
Boiling dist. water              ... ... ... 2 ..
Alcohol         ............... 16 ,,
To make the emulsion, take of
Solution A. ... ...... ... ... 60 parts,
and add gradually, with constant shaking
Solution B................ 5 parts.
Then in the same manner
Solution C. ... ... ... ...... 6 parts,
and finally
Solution D....... ... ...... 4 parts.
The emulsion should be allowed to stand at least eight days, and it works, if anything, better in six months.
Liesegang's Formula. A.
Silver nitrate            ............ 2 parts.
Alcohol (weak or ordinary)           ...... 100 ,,
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