The Dictionary Of Photography

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

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Varnish
The function of the powdered glass is purely mechanical. (For a table of the solubilities of various resinous materials, see p. 598).
For photographic purposes special varnishes are  required, and the following will be found very good ones: -
Negative Varnish.
(0
Orange shellac ............      i£ oz.
Mastic ...............       I ,,
Sandarac ... ... ... ... ...      ij ..
Oil of turpentine ... ... ... ...       ^ .. \
Venice turpentine...... ... ...       J ,,
Camphor ...............    10 grs.
Methylated spirit, 66 over proof......    20 ozs.
Or
(2)
Orange shellac............      2 ozs.
Sandarac ...... ........      2 ..
Canada balsam ............    60 grs.
Oil of lavender ... .........      1 oz.
Methylated spirit ............    16 ozs.
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