The Dictionary Of Photography

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

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Carbon Processes
Black Tissue.
Jelly.................. 2 lbs.
Paris black pigment           ......... 50 grs.
Red Chalk or Bartolozzi.
Jelly.................. 2 lbs.
Venetian red            ... ......... 3 ozs.
Indian ink . ... ... ... ...... 8 grs.
Transparency Tissue.
Jelly.................. 2 lbs.
Indian ink ... ... ...... ... 200 grs.
To make Double Transfer Paper.
Hard gelatine          ......... ...        1 lb.
Fine sulphate of baryta ... ... ...        2 oz.
Water           ................        5 ,,
Soak the gelatine till soft, and dissolve by the aid of heat; mix the baryta, and add
Chrome alum           ... ... ... ... 50 grs.
dissolved in
Water           ......          ........ 4 ozs.
For Single Transfer Paper. Hard gelatine          ... ... . . ... 1 lb.
Water            ...... ... ...... 5 pints.
Soak the gelatine, and dissolve by heat, and add a few drops at a time, sufficient of the following to slightly coagulate the mixture.
Chrome alum           ... ... ... ... 300 grs.
Water           ............         ... 1 pint.
The mixture being now somewhat thick and ropy, sufficient acetic acid should be added to make it again liquid. The "new" carbon processes without transfer are, like many new things, in their main and essential features the oldest, and much attention has recently been given to them. The article in this Dictionary, Artigue's Process, gives such working directions as should enable the reader either to obtain satisfactory results on the ready-prepared paper manufactured under the superin-
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