إصلاح ألوان الصور الملونة الرفرسال بعد عمليات الإظهار . كتاب التصوير الملون

We have already learned that during the stages of printing or enlarging negative colored images on sensitive colored paper to obtain positive images, it is possible to repair any defects in the colors of the positive images. (And we will discuss this topic in detail in the eighth chapter (As for the transparent colored reversal images, it is a goal in itself, and it is not an intermediate means to obtain a positive one. Therefore, it is inevitable to perform color correction on the same original reversal, and not in the stages of printing or enlarging as We have learned about negative films, and that is unless we intend to make copies of the reversal film, because in this case it is possible to correct the colors of the copies during the seventh or enlargement, similar to what is known regarding printing or enlarging negatives.

Fixing the colors of the colored images after displaying:

The color fixing methods are divided into two main parts: - (1) Chemical Methods: It aims to treat the dyes arising in the colored film layers.

(b) Physical Methods: which are:

aim to put

A layer or layers of transparent colored materials or surfaces that act as optical filters. These materials or surfaces may be colored gelatin or cellophane paper placed over the reversal image, or the colors may be fixed by dyeing the entire image. The theory of color correction is summarized in the following (1) either by adding a complementary color to the Color Cast to equalize it, and in this case the intensity of the reversal color image increases. If the image suffers from a scarlet tinge, then the correction according to this method requires adding a green colored layer

(b) Subtracting or deleting part of the excess color that makes up the smear. In this case, the intensity of the color image is reduced. If the picture suffers from a scarlet tinge, then the correction according to this method requires that we remove the excess amount of the scarlet dye.