طباعة الصور بالملامسة سهولة الأنجاز وفوائد متعددة ١_a ,مجلة فن التصوير اللبنانية _ ع٩

Touch printing is easy to perform and has multiple benefits

When the photographer's experience in endorsing and printing black and white photos increases, he is motivated to make enlargements of his photos on different scales, but the most experienced photographers cannot. Predicting what the image will look like just by looking at its negatives. From here, the importance of endorsing these negatives and printing them in a primary form according to their basic measurement emerges. And on the method of touch printing, which despite its ease is accomplished, but it provides the photographer with many benefits, the most important of which is making a decisive decision about the image that deserves to be enlarged. Determining the appropriate color contrast for the paper on which the magnifications will be printed. E. Estimating the exposure time that the magnifications need. The best possible visual effect of light and the method of endorsement E Knowing the adjustments needed by the photos - if they need that - at the exposure levels E Adopting these prints as an archive, for the photographer, to help him locate his negatives easily.

A special device In addition to the tools used in the production of ordinary black and white photos, the photographer needs a special device to achieve the touch-printing process. Most of these devices consist of a glass plate, which opens from one end, like a book cover. over a solid base, so that it is Install the negatives on the bottom page of the glass plate using tweezers or adhesive tapes, and a sponge roll is used to press a slide of printing paper on the negatives when the device is closed. This simplified explanation of the device confirms that we can dispense with it and make a replacement for it ourselves, very easily, by means of a glass plate and a subtraction of sponge or some newspaper papers, and then the negatives are affixed to the glass plate with small pieces of adhesive tapes and we apply the same method for the device as the printing process.

It is clear first that contact images are not intended to look elegant and complete..because they do not aim more than to provide us with information, but the most important thing in them is to preserve the method in which they were produced..and this means to have an accurate knowledge of the method of exposure and development to be adopted later with coils Films that we print in the future. Before we start, we have to cut the film in equal sizes, where we fit each clip into five or six frames, and then we test the contact device on the magnifying device and directly under the lens.. so we light the magnifier to adjust the light area that is supposed to cover the contact device. The red safety stick the cut negatives on the glass so that the shiny side is towards the bottle, and in the other direction we put the sensitive paper, which you usually use in printing, and then press With the sponge subtraction with the device closed.. and when making sure that the device is placed in its location under the lens, the red light is turned off and the light of the magnifier is turned on for a very short period - about five seconds approximately - this is if the film is a detector with number 3 paper. After that, it returns to light the red light and works to withdraw the paper and put it in the display solution. If it appears quickly, you need to close the magnifier lens with two holes, then reprint again .

The endorsement process is done according to the method usually followed, and as we indicated in a previous episode, and here the printed image should tend to be completely black on its sides... As for those with gray spots on these outer garments, the exposure time should be prolonged
The washing process is also carried out according to the method used in washing - normal photos ... and drying them as well.

Multiple benefits With the help of a magnifying lens, each frame of a group of printed images can be examined by touch to detect any camera vibration or the presence of an incorrect focus completely. It is also possible to know the possibility of improving some printed areas by adjusting the exposure. Dark areas, for example, need a double exposure, while those The detector only needs a flash exposure .

The value of the image can be doubled by deleting the unnecessary details from it. To make sure of this, two small pieces of cardboard can be used in the form of the letter (1) and at right angles. These two pieces will contribute to making a decision in the appropriate form for the required frame, while specifying the extent to which negativity is intended to be enlarged. However, this should not be exaggerated. By deleting parts of the negative, because the greater the enlargement of the small section of it, the more the pointing becomes clearer in the final print, and the less sharpness and clarity of the image decreases, so it is only advisable to cut out the annoying details from this negative, and it is possible to adopt a (chinagraph) pen to put the cutting lines.

Archive

The contact chips made by the photographer can constitute a permanent and valuable archive for him. And that is by keeping them in folders specially made for them.. so that each negative clipping is placed next to its print to facilitate the process of finding it when needed, and a quasi can be adopted. An index, so that the prints are placed separately, with numbers indicating the negatives kept in envelopes also numbered according to the numbers of their counterparts in the folder of the contact-printed photos.

Exposure - Appendix . There are four common methods for adjusting the exposure time during printing, and this process must be done accurately if it is required to achieve a meaningful goal and repeatedly. The moving red filter under the magnifier lens can be used, with caution not to bump into the magnifier - and expose it to vibrations during the exposure period. photosynthesis. E It is possible to use a piece of cardboard to cover the beam with the beginning and end of the internal exposure, in order to give time for the vibrations to subside before the actual exposure process. E It is advisable to adopt the main electrical switch of the magnifying device to secure the exposure. Away from the problems of touching the device and its vibrations, but here we have to pay attention not to shake the head of the amplifier itself.