الوسائل الكيميائية لاصلاح ألوان الصور الملونة الرفرسال .. كتاب التصوير الملون

Chemical means to fix the colors of the colored pictures of the reversal:

Some factories approved and published some of the methods that we will mention, and others decided not to publish anything on this subject, but on the other hand, researchers published them after successful studies and experiments. It is fortunate that these experiments showed that the dyes that originate in some color films such as Agfacobot, Ansco Color, can be affected by chemical treatments after they are created in the colored film layers. Rather, it is possible to control, by means of these coefficients, a dye originating in a layer without affecting the two pigments originating in the other two layers. As a result of following these methods, Reduction decreases the density of pigments. Berger (1) stated that it is possible to remove the color smears that cover each of the Agfacolor films and the positive transparent colored films by chemical means. that processes are shown. However, these methods are absolutely not suitable for any of the colored negative films or colored positive images printed on paper. The following should be noted with regard to these chemical processes: The treatment in solutions - which we will mention later - results in a decrease in the general density of all colors to some extent. Therefore, it is better not to follow these methods unless the general density of the forms is slightly greater than The usual praise. Stages are done after

The duration of treatment in solutions depends on the degree of correction required. Color correction is faster if the film is dry than if it was previously washed in water

After treatment in solutions, the films should be washed thoroughly in water for a period of not less than 20 minutes, then dried. (1) Dr. Heinz Berger, Agfacolor-2nd edition, p. 196.