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Black and white image processing .. How to process images .. Photography book

How to process images
Black and white image processing

Photo printing is one of the most important and exciting areas of photographic activity, however it requires knowledge of how errors here are difficult to correct.

Some conditions must be respected if we want to obtain images with a stable quality. The presence of a laboratory, whether permanent or temporary, is essential because it must be available - a dark room illuminated only - during the drawing - with light that has no chemical effect. We quickly get used to this soft lighting. Electricity and water must also be available (noting that running water is not absolutely necessary in the laboratory itself).

The baths work best if they are at a temperature close to 20 ° C. Ideally, the entire dark room should be at a temperature of 20 ° C. All liquids should be as far away as possible from the magnifier and from the sensitive paper.

Before starting the drawing, make sure that the tools and solutions are ready for each stage of the development. When you start, you cannot stop to prepare a solution. Have all your equipment at hand.

- Image processing:

The normal rule is to expose a photographic sheet under a magnifier that displays a negative draft image. Once the exposed sheet is placed in the developer, the development time must be calculated. This time ranges between two and three minutes. It is important to stir the solutions and the special image at the beginning of the treatment so that the sensitive surface remains in constant contact with the active materials. After development, the image is placed in a bath that immediately stops the action of the developer. A few seconds are sufficient for this. Then the image is immersed for ten minutes in the basin containing the fixative. As for washing, the last stage of the treatment, it is of great importance because any trace of the chemical materials that remain stuck to the paper will distort the image after a short or medium period.

Under lighting that has no chemical effect, quickly immerse the image in the developer.

Move the image with forceps until the end of the development.

Remove the image with forceps and shake off the excess developer.

Using another clean forceps, immerse the image in the developer stop coat.

Move the image in the stop solution.

Use tweezers to remove the image from the fixing bath and clear it.

Stir the image in the final chemical solution: the fixer.

Stir in the fixing bath and turn on the white light after five minutes.

Inspect your image in the fixing bath under the white light.

If the image is good, transfer it to the wash basin.

Wash the image in running water for at least an hour.

Remove the image from the wash and wring it out before letting it dry.