إبداع صور في المخبر .. كيف تعالج الصور .. كتاب التصوير الضوئي

Creating images in the lab .. How to process images .. The book of photography

How to process images
Creating images in the lab

- Interlacing:
Interlacing produces a smooth and regular cracked network that overlays the negative image. In the past, it was considered a major error in the image or film, and this incident has now been avoided in the emulsion manufacturing stage. This means that it is very difficult to induce interlacing intentionally in current films: but we can achieve this by changing, suddenly, the temperature of the processing baths (between fixing and washing, for example) or by adjusting the degree of alkalinity (between developing and washing). It is often necessary to combine the two to obtain a good result.

- Light paper (in the clouds):
It is a paper with a high contrast that transforms a normal negative image with an intermediate color gradation into a positive image in the clouds composed only of black and white. It works under deep red light and appears in a special appearance called (light).

To obtain deep blacks, develop at the recommended temperature of 20°C by constantly moving the image. Each reduction in the development temperature results in lighter brown images.

- Montage:

We get the montage by collecting several selected images cut and pasted either side by side or by overlaying. To make the trick complete, pay attention to the lengths of each element and carefully remove all the white edges where the images are joined. When the montage is finished, the result can be photographed to obtain a negative image on which the final copies are drawn.

- Montage image:
This large-scale image represented on pages 8-9 resulted from collecting six images: the empty room with the open door - the man's hand and arm - the upper part of the mirror, the fishbone - the fish's tail and finally the cat on his table raising his leg to get the piece of meat extended to him. I displayed these six images individually on calque paper using a magnifying glass to determine the dimensions of each image in the final montage. When the images were taken to the required size, I carefully cut the white edges and colored them black so that they would not be seen. These pasted elements formed a montage image that only remained to be photographed. A few small lightenings on the final image also improve the result.

- Montage image with sunning:
If the image of the mirror was taken in the natural way, the image of the girl was sunned: therefore I pulled the negative by contact with linear film (tri): at two-thirds of the development time I turned on the white light in the laboratory for a brief moment and then finished the development. As for the film, it was enlarged by a long stop after it was fixed, washed and dried due to the density of the negative image. In any case, we can pull the sunned film by contact on another film to obtain a less dense image and we can renew the sunning of the resulting cliché to obtain a double sunning.