How does darkroom technology work?

Put the film in the developing tank in the darkroom. Turn the developing tank to develop the film. When you develop the photo, it looks like film.

Then choose the ideal negative under red light (photographic paper is color blind. Will not be exposed under red light), and then put it under a magnifying glass and image it on photographic paper. This process can also adjust the composition. When you are satisfied, you can open the aperture of the magnifying glass and expose the photographic paper (choose the appropriate exposure time according to the density of the negative). Then put the photographic paper into the developer for development (about 3 minutes), and then put it into the fixing solution for about half an hour after development. Then,

Traditional photography and printing processes all use the photosensitivity of silver salts to make photos. Because the photosensitive material contains silver halide, before making the final photo, the film and photographic paper must be carried out in dark or dark red environment. In fact, the darkroom is not completely black, and black-and-white photosensitive materials are not sensitive to red, so the darkroom can use red light; Color photographic materials is not sensitive to orange red, so the darkroom can use orange red light.

The effect of automatic development is mechanical, and real photographic works of art must be processed in a darkroom. Of course, with the current computer, many superb darkroom skills can also be done on the computer.

Generally speaking, the traditional printing technology not only has high cost and pollutes the environment, but also affects the health of operators because of the large use of chemicals and precious metals (silver). With the continuous development of digital technology, it is gradually decreasing.

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