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CARE OF FILM
(Continued From Page 89)
and dry it thoroughly by heating it in an oven. When dried sufficiently, pack it loosely in a light-tight box; place the film (wound loosely) in the center of the paper and allow it to remain over night. The paper will absorb any ex¬ cess moisture from the film; thereafter, it should be packed immediately. The black paper used in dehydrating can be dried again in the oven and re-used.
2) Take a metal container partially filled with calcium chloride and place on the bottom of a large, light-tight and air¬ tight wooden box. Into this box also place a large quantity of black paper and also the exposed film. Allow film and black paper to remain in this dessicating box for at least 24 hours. Then wrap the film in the black paper and seal it in shipping cans. In using this method, care must be taken that neither the black paper nor the film come in contact with the calcium chloride; oth¬ erwise the film will show spots that can¬ not be removed. The calcium Chloride may also be re-used many times before discarding.
After dehydrating by either of the above methods, the film should be wrapped immediately in dry black pa¬ per and sealed in a dry film can. Seal the can with tape in the usual manner, then paint the tape and edge of can with hot paraffin to form an air and mois¬ ture-tight seal. The Photo Products Di¬ vision of the DuPont company offers an excellent black lacquer for this purpose.
It is not advisable to use newspaper or any kind of wrapping paper for pack¬ ing film, as these generally contain chemicals which can prove injurious to the sensitive emulsion.
A final precaution is always to keep salt air from reaching your film. It has a tendency to fade exposed film and to produce moisture spots. Therefore, when shooting movies at tropic seashores or on board ship in tropic regions, load film indoors, and do it as quickly as possible so that the film will not suffer any adverse effects from exposure to marine air.
The preceding article is condensed from “American Cinematographer Handbook and Reference Guide,” published by Jackson J. Rose, ASC, Los Angeles, Calif. — Ed.
Eastman Kodak Company has started moving photo processing equipment from its San Francisco Laboratory to the company’s new processing labora¬ tory at Palo Alto.
The new laboratory will serve the Northern California Oregon Washington-Idaho-Nevada area.
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American Cinematographer
February, 1954