because the light rays do not have any influence on the solution of a collection. Dark space in the process not at concentrated with dark room
2. Shine/Polishing Drug Afdruk (in a darkroom).
Polishing/shine a light sensitive materials (drugs afdruk) on the surface of the screen can be done in several ways as follows:
a. Polishing with a ruler elbow can produce a layer of thick layer of snow as well as the collection is quite good. In this way does not cause the foam on the Layers collection.
b. Polishing using a thick layer of generating kwas
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