The Dictionary Of Photography

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

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Varnish, Removal of
View Finder
Matt Varnish. This can be prepared from : -
(i) Sandarac ....... ...... ioo parts.
Mastic (in tears) ......... 20 ,,
Ether...............1000 ,,
Benzine        ... ... ... ... 500 ,,
Sandarac ... ... ... ... 60 ..
Gum Dammar        ... ... ... 60 ,,
Ether...............icoo M
Benzine ............350 to 400 parts
The more benzine is added the coarser the grain, and vice versa, Lainer strongly recommends : -
Ether............... 100 parts.
Sandarac ............ 10 ..
Dissolve by agitation, filter, and add -
Toluol          ............ 35 to 40 parts.
Varnish, Removal Of. It is often necessary to remove the varnish from a gelatine negative in order that intensification or reduction may be resorted to, and this is a very simple matter when the varnish is of a resinous nature. A porcelain dish of suitable size is made warm by immersion in hot water, and it is then wiped dry and the negative placed therein, film upwards. Enough methylated spirit to cover the plate is now poured in and the dish is rocked for a few seconds, when the film is gently scrubbed with a tuft of cotton wool. Two more changes of methylated spirit will now serve to sufficiently clear away all traces of the varnish, after which the plate may be transferred to a vessel of water, or may be wiped dry with a soft cloth.
View Finder. This is a little instrument used for instan-taneous photography to show when the moving object is in the middle of the field of view and in the middle of the plate. One form is a piano or double-concave lens mounted on the front of the camera, the eye being placed at the back of the camera. A good form of this finder is with a concave lens mounted with a mirror at an angle of 450 behind it. Another good method is to
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