إظهار أفلام أورفور كلور الرفرسال .. كتاب التصوير الملون . الكاتب عبد الفتاح رياض

Moving movies while showing:

The metal frames bearing the films are moved regularly during the first ten minutes in the first exposure solution, then the stirring stops during the next period (which is 22 minutes). As for during the duration of the color display (which is the step indicated in its number in the previous table, p. 230), the film is moved permanently during the period specified in the schedule. Before transferring the film from one bathroom to another, we must move the frames carrying the films twice or more vigorously.

Magnesium Sulphate Bath Function:

Washing in water (Low-sat soft water) may result in cracks occurring in the gelatin reticulations, or the gelatinous layers tend to separate from the stripping support from the edges of the film, or air bubbles accumulate. These problems can be overcome by treating the film in a dilute solution (2012). Magnesium sulphate bath for three minutes after the first and colored exposure phases, then the film is washed with water for the periods specified in the schedule.This bath is not required except in the case of water washing. Or using tanks to show tank development, as it is usual for the second exposure and the film to be done under water, and here the duration of the second exposure is increased to ten minutes instead of five.The exposure is done by neon tubes 20 cm away from the film, or by a 500-watt tungsten lamp. A distance of not less than 75 cm from the film, to prevent any damage to the film

The film is due to the heat of the lamp. a light . Lab safety:

The process of first exposure and subsequent washing must be carried out in complete darkness. If it is considered safe light to be used in the work, then let it be done using a dark green Orwo filter No. 170 (10 Orwo safe light filter) with a 40-watt lamp if the lighting is indirect and away from The film is not less than 2 meters, but if the lighting is direct, a 15-watt tungsten lamp is used, at a distance of not less than 75 cm from the film.

Drying:

In a place free of dust, the temperature of which does not exceed 30 C. It is more appropriate to move the air during the drying period.

Reactivation of display solutions:

Desiring knowing that the activity of the brightener solutions decreases gradually after showing each film, therefore - in order to stabilize the effect of the brightener solutions in all the films that are being shown - it must renew its activity at the rate of 40 cm 3 of the solution of reactivation of the first appearance, 50 cm 3 of the regeneration solution Replenisher activity color rendering solution, after showing each movie. It is always noted that the well-appearing solution is stirred after adding reactivation solutions. α obligatory

The ability of solutions to remain in working order after being installed, whether they have been used previously or not

days 28 days

First show solution

The rest of the solutions used in all stages

Assuming that the solutions were packed in a covered tank.

.

The ability of the solutions to work

d Films, whether they are 35 mm miniatures or rolled films

solutions

First impression solution (without reactivation) (with reactivation) colored (without reactivation) (with reactivation)

films

Bleach bath bath increase hardness and fixati

installation bath

Stabilizing Bath

Diluted balloon bath 1:200 (Wetting agent F 905) magnealam sulphate bath

Note: By adding 20 grams of potassium bromide to the bleaching bath, its working capacity can be increased to twice the above number.