الأفلام الرفرسال الملونة فرانياكلور .. كتاب التصوير الملون

Feraniacolor colored films

These films fall within the category of multi-layered reversal films that carry color problems in their layers. Some of them were prepared to work in daylight and the other in the light of industrial lamps whose color temperature is 3200 Kelvin. And the speed of sensitivity of both types = or 15 DIN. The factories of these films have published the following original solutions compositions A.S.A YO -

First show solution

First Developer (RC 109).

Calgon

Sodium sulfite (powder)

gram

Calgon,

Sodium Sulphite (anhydrous)

Amidol

potassium bromide

Amidol

potassium bromide

water to make up the volume of the solution

PH value = 7.5

Hardening solution

Hardener (VC 207)

Sodium acetate (anhydrous)

Boric acid

07 grams 30

Sodium acetate (powder)

boric acid

potassium alum and water to make up the volume of the solution

Potassium alum

Colored highlighting solution

Color Developer (RC 103)

1 gram 2.8 d

Hydroxylmine hydrochloride Activol S (Diethyl p-phenylene diamine sulphate)

water to make up the volume of the solution

(Please refer to the notes)

2 grams

70

Calgon

Sodium carbonate (powder) Sodium sulfite (powder) Caustic soda

potassium bromide water to make up the volume of the solution

The H value ranges between 11-112

Calgon

Sodium carbonate (anhydrous)

Sodium sulphite (anhydrous)

Sodium hydroxide Potassium bromide

solution b
comments:

(1) The film is exposed to light from both sides, each for a minute and a half, at a distance of one foot from a 100-watt Photoflood lamp. (2) It is desirable to treat the film in a solution of (crystalline) magnesium sulfate, the concentration of which is (2

directly after the color display.

(3) Assuming that we want to reduce the contrast while increasing the warmer colors, it is possible to do this by reducing the durations of the first display and the color display from 14 minutes, 8 minutes to 12 minutes, 7 minutes, respectively, but it can be reduced to 10, 6 minutes as well if We wanted to

Reduce contrast a lot.

(4) For the composition of the colored highlighting solution, each of the solutions A and B is prepared separately from the other, then the solution A is added to the solution B with continuous stirring. (e) It is permissible to replace the lubricating agent - Activol (2.8 g per liter) with any of the following:

the following salts: -

A - 5 2 grams of Astival with a reduction in the amount of powdered sodium sulfite from 25 grams to 1 25 grams per liter. b- 2 2 grams of Activol-H per liter, keeping the weight of sodium sulfite the same.

(1) Assuming that the sodium carbonate was pure (and originally prepared for photographic purposes), the amount indicated in the composition of the show solution of caustic soda (which is one gram per liter) guarantees the preservation of the PH value to the extent required for all usual purposes, even if we require extreme accuracy, then it It is necessary to measure the degree of alkalinity with the PH scale and adjust it to the required degree completely with a simple adjustment in the amount of caustic soda. This will not lead to detection of the degree of alkalinity by (litmus papers) to a very accurate result

The ability of solutions to remain viable:

A - None of the two solutions (the first or the colored one) have the ability to remain without damage for a period of more than 48 convictions if they were previously used, but they remain valid for a week at most if they were not previously used, and they were well preserved in controlled shaker

b - As for the other solutions, they are able to remain valid for several months, assuming that they were kept in airtight bottles that do not leak into them.

A Bleach-Hardener solution must be kept away from strong light, in addition to the bottle must be sealed against air entry.

D - When the previously used solutions are kept, it is possible that the solidifying solution becomes colored

Yellow, and a blue precipitate is produced in the bleaching and hardening solution, and silver (gray in color) is precipitated in the fixing solution. This and the previous signs do not have any indication of the deterioration of these solutions, but it is necessary to work on filtering them before using them.

Amount of work performed in each liter of solution:

Assuming that all the observations related to the ability of solutions to remain viable and previously mentioned above are taken into account, then in each liter of any of the display solutions, three films of roll films, or three films of 35 mm 36, or five films of 35 mm 20 can be treated. picture .

Each liter of other solutions is suitable for the treatment of ten roll films or ten of the 35 mm 36 films or fifteen. 35 mm 20 photo film