The Effect of Directional Development,
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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The permissible values of the directional effect in cinematography were approximately determined. The appearance of the directional effect in movie positives can be obviated by using speeds of film movement 2,000 metershr for Metol hydroquinone developers and speeds 1,000 metershr for Phenidone hydroquinone developers. The appearance of the effect in movie negatives can be averted only by using spray-bath development. An attempt was made to quantitatively evaluate the conditions of the movement of the developer in the developing machine and the relation between the directional effect and the width of the photographic layer.