What is the principle and process of photo printing?

To put it simply, the principle of developing photos is that the silver salt photographic paper is exposed by laser in a closed darkroom, so that the silver (silver halide) on the photographic paper is sensitized, then the coupler appears inside, and finally the excess substances are washed away with chemicals to form a color image. This is a chemical reaction, an intermolecular dynamics, and an image drawn by light.

Printing photos belongs to digital printing and belongs to the cutting-edge technology of photosensitive industry. Digital printing is the whole process of digital input, image processing and image output. Digital printing adopts the method of color expansion. Digital printing exposes digital images on color paper and outputs color photos. Digital printing is a high-speed, low-cost and high-quality method to make digital photos.

Extended data:

Printing photos is different from any other imaging method. It is a chemical reaction, which makes the color gradually generated from the inside out, so its color has strong stability. In addition, the printed photos have a long history and the images are kept for a long time, so from the day of their birth, they are responsible for recording valuable images such as important historical moments and major historical events in human civilization.

Photos are developed with light as a brush, with natural, delicate and realistic colors, excellent clarity and reproducibility, stable images and a long history.

It is widely used in various images left by residents in daily life, travel and parties. Group photos kept by schools, institutions and units; Wedding photos taken by couples when they get married; Handle photos of various certificates; Precious images taken by professional photographers and journalists; Professional commercial advertisements such as high-end luxury car brochures and high-end hotel menus.

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