إظهار أفلام إكتاكروم .. كتاب التصوير الملون ، الكاتب عبد الفتاح رياض

Fixer

Overnight bath

Hypo (crystals) Sodium bisulphite

Water to

150 grams 15 grams

Hypo (crystalline)

Sodium bisulfite, water, volume of solution

stabilizer

Color fixing bath

Formalin (40 per cent formaldehyde) Johnsons 326 (wetting agent)

formalin

Water to

water to make up the volume of the solution

comments :

1- In preparing the first negative display solution (white-black), it is better to dissolve the salts in warm water (its temperature is between 35-40 5 C) and that it is distilled. If it is difficult, add 2 grams of Calgon to each liter of water. 2- It is possible to control - to some extent - the colors of the final image through some means

The following factors: -

(a) Visit the amount of sodium isocyanate salt Sod. Thiocyanate can increase the color of the picture, but it follows from that side from the other - that the yellow colors in the picture are weakened, and in any case the weight of this salt must not be less than 1.9 grams per liter and not more than 21 grams.

(B) By increasing the temperature of the exposure solution (the first black white) above 24°C, the image will be covered with a crimson tinge, and if it is less than that, it will be covered with a tinge of cyan. 3- It is more appropriate to dissolve Phenidone in a little warm water before adding it

to the rest of the solutions

The addition of potassium iodide is optional. Its purpose is to control the appearance of the three sensitive layers, especially those in which the yellow pigment is formed. The results that you can get from the previous solutions are almost similar to those that we can get when using the original solutions produced by these film factories (Kodak).. There may be slight differences between the two cases, due to the difference between the producers of salts and chemicals and their degree of purity. not
Functions and properties of some chemical compounds in the composition of solutions

(1) Citrazinic Acid (CZA): It works in the colored display solution as a restraining agent, as it prevents and increases the intensity and contrast of the dye image. As a result of its absence or decrease in its quantity, the image appears to be covered with a clear tinge of green, and conversely, an increase in its quantity results in the image appearing to be covered with a pinkish-brown tinge, even if the increase or decrease does not exceed 10% of the degree of concentration.

(2) Ethylene Diamine Tetra Acetic Acid Disodium Salt: It stands for EDTA. It is a salt that works as an accelerator in the primer solution. If its quantity is decreased, it will transfer the intensity of the image and tend towards yellowing. If it increases, the intensity increases and the degree of bluishness of the image increases. An increase or decrease of 10% from the prescribed limit is guaranteed in order for the defect to appear evident.

(3) Benzyd Alkohol: Helps the colored highlighting solution to permeate the problematic colors that are naturally not affected by water Water Proof Color Formers. As the preparation of the colored highlighting solution begins with adding this liquid to the water, therefore it is very important that we first verify that it is completely dissolved in the water before starting to add any of the other chemical compounds.

(4) CD3: It is the trade name given by Kodak factories to the compound that is sometimes known by another trade name, Mydochrome, and the effect of increasing or decreasing its quantity is similar to the aforementioned effect on the previous Edta salt that we talked about in item No. 2. with