أبيض وأسود ٢_a .. كتاب فن التحميض والطبع والتكبير

Until you reach the end of the film that you will find attached to the paper back. Gently peel off the film or cut it with scissors, then attach it to the helical roller

As for 110-dimensions films that are in a plastic capsule, there is a mark on the surface facing the lens. Break the capsule at this mark, then gently get rid of the plastic parts, then unroll the film from the reel by yourself. The film method is 120 mm in size, and there is rarely a developing tray of this size. Therefore, it is acidified in complete darkness, in three basins, like sensitive paper, but with use
Film extraction 110

The appropriate development times for films

After wrapping the film on the spiral reel, place the reel inside the acidification tray and close it well with the first cover, which allows the entry and exit of liquids and does not allow liquids to enter and exit. entering the light. It is noted that there are some types of developing boxes in which 35 mm films can be packed in the light, provided that the edge of the film is left protruding. slot from

The cassette After you make sure that the box is sealed, you can now turn on the light

normal.

2- Display:

keep. Put the acidification tray in a water bath with the bottles of solutions until: the temperature is constant during the different stages of acidification

A - Pour a suitable amount of the show solution into the development tray gently through the hole in the first cover. You can use a funnel if necessary (and this quantity varies from one film size to another, as well as according to the number of films, each film on a spiral reel) that is in the can. The solution covers the spiral roll completely and usually 400-500 cm of diluted backing solution is sufficient to develop one 35M or 120M film.

B - start timing.

It is inserted from C - Move the solution on the film for 30 seconds, either by turning the can over several times (after fixing the second cover that prevents liquid spillage, or by moving the spiral roller inside the can using the stirring stick that opened the first cover, and then stir the solution for five seconds every 30 seconds, or For 10 seconds every minute, and whatever the stirring method or stirring time, the same method must be followed every time so that you can get identical results, because stirring affects the acidification speed, and the more stirring, the acidification speed increases to some extent.

D- At the end of the time specified for the development (usually 8-10 minutes) according to the instructions of the film maker and the [development] solution, turn the box over to pour the solution into the drain [which is better] or pour it again into the bottle of the developer solution if it is from
The type that can be used more than once.

-- Suspension: It has already been mentioned that the suspension solution as well as the hardening solution can be one of the components of the fixation solution. In this case, wash the film.

with water.

a- Pour the stop solution (or wash water at the same temperature) into a container

acidification

B - Run the timer

c- Stir the solution continuously for 30 seconds.

D - Empty the stop solution again into the stop solution bottle (Make sure to wash the funnel after each time you use it).

4- Installation:

Stabilizing solution may contain stand as well as hardener a. Pour the stabilizing solution into the acid tin

b- Turn on the timer c- Stir the solution continuously for 30 seconds and then for 10 seconds every minute.

After about 5 minutes, you can open the box cover and watch the movie on the reel. If the film is clear, put the roll back in the can and continue to move in the same manner until the time is up (10 minutes).

If the film is not clear (such as if milk was spilled on it), put it back on and observe it every two minutes and record the time it took for the film to become completely clear. Leave the film in the fixative solution, stirring, for the same time as it took for it to become completely clear.
The fixing solution is considered exhausted if it takes twice as long as it used to take while it was new to make the film clear, and in this case it should be disposed of immediately. D - When the time is up, pour the solution back into the fixing solution bottle.

E - washing:

Ensure that the wash water temperature is not too different from the temperature of the solutions

acidification

A- Remove the lid of the acidification can, and wash the film while it is still on the spiral inside the can with running water. The water must reach the bottom of the can to get rid of the residual chemicals that usually remain at the bottom. This is done either by inserting a thin hose attached to the tap to the bottom of the can through the central hole of the spool, or by placing a cork under the spool and letting the water fall gently from the tap through the central hole of the spool. Continue washing for at least 30-45 minutes.

B - At the end of the washing time, add a few drops of wetting agent (if any) and leave it for two minutes, then take out the reel and remove the film from it according to the instructions of the developer tray maker, but this is often done by tightening the end of the film.