صنع قصاصة الاختبار .. كتاب طبع وتحميض الصور الفوتوغرافية

b- Making the test clip :

At the beginning of your work in the manufacture of prints and enlargements, you need some time until you instinctively recognize the time required to expose each print as professionals do without making test scraps. In order for you also to obtain this talent or skill, some effort must be made in making several scraps of the first negatives that you print. There are also two ways here to make a clip:

The first method:

poison . From its envelope - Turn off the room lamp, then take out a 20 x 25 print sheet and cut it into four sections as you did before, or use one of the extra scraps from previous experiments. 2- All amplifiers have a built-in safety light filter. Put this filter in
Place it under the lens of the magnifier, then light the lamp of the magnifier and place the test piece over the basic shape features that the magnifier's light presents through the filter. Now turn off the magnifier and slide the filter from under the magnifier lens. Cover the test strip with a piece of cardboard, leaving only a small part of it uncovered

cover.

4- Turn on the magnifier lamp and run the timer at the same moment. Slide the piece of cardboard off another section of the paper every 10 seconds to expose it to the light of the magnifier. Be careful not to move the test strip as you move the cardboard

above it .

Slide the piece of cardboard off another section of the paper clip every 10 seconds.

e - Turn off the magnifying lamp after a period of 60 seconds has elapsed, then remove the acid.

The second method:

Kodak exposure time scale is used. 1- Turn off the lights in the room, take out the photographic print paper measuring 20 x 25, then cut it into four equal parts. Put one section in front of you and put the three sections back in their envelopes.

2 - Put the magnifying filter in place, blocking the light of the magnifying glass, light the magnifying glass, and then place the test clip over the main features of the image. 3 - Place the exposure time meter directly above the test clip and then turn off the magnifier lamp.

Place the exposure meter on top of the piece of paper.

4 - Slide the magnifier and turn on the magnifier lamp for exactly 60 seconds. E - Turn off the magnifier lamp after the 60-second period ends, then clip acid

the test.

Use the following steps to develop one of the above-mentioned scraps. 1- Slide the clip all at once into the applicator plate, then gently shake it after it is completely dipped with tweezers. Appear for 60 seconds or as long as recommended by application instructions

Slide the cutout all at once into the theme plate.

2- Remove the clip from the applicator and place it in the stop bath for 30 seconds.

- Remove the clip from the endowment bath with the help of the second forceps. Let excess solution drip off the clip before dipping it into the stabilizer. After 30 seconds have passed since the clip has been in the retainer, turn on the room lamp and check the clip.

Put the test clip in

Install and leave it in it for at least one minute.
This type of test clipping is not kept, its purpose is only to know the time needed to expose the final print.

- snip

Test subjected according to the first method note the density differences between the top and bottom.

The clip that was exposed according to the second method shows that the exposure time for 10 seconds is the best, while the other values ​​seemed to be either too light or too dark.

C - Making the final edition:

Now that you have determined the exposure time and the endorsement time, making the print is a very easy process. Here are the steps for making the final print. 1- Turn off the room light, then make sure that the negative is still in full focus. 2- Take a 25 x 20 print sheet out of its box and place it within the frame of the paper holder in order for it to remain flat during the exposure. Remember that the sensitive side of it should be upwards.

Place the print sheet within the frame of the sheet holder.

3 - The lamp of the magnifier is lit for the period necessary to obtain a good exposure, according to the results obtained from the test clip.

Illuminate the magnifier lamp for a period of time equal to the period you reached with the test clip.

4- Remove the paper from its holder, then slide it all at once into the appearance plate for the same time it took for the test clip to complete its endorsement. Do not forget to shake the print during the period of gently shaking the paper during the endorsement period.

endorsement.

dip

Printing paper in appearance.

e- Remove the paper from the developer solution, then dip it in the stop bath for 30 seconds. 6- Remove the paper from the waqf bath with the help of the second tweezer, then place it directly in the toilet bowl

installation bath.

7- After a period of 30 seconds has elapsed since it was dipped in the fixative solution, light the room lamp and check the result obtained. The print must remain inside the fixer for 10 minutes before being removed from it. - After the installation is complete, put the print in water to wash it.