What is the influence of temperature on the development of black-and-white photography experiment?

The development of black and white film and photographic paper and the temperature of developer have great influence on the development of film and photographic paper. Generally, the temperature of developer is controlled at 65438 08 degrees Celsius. When the temperature exceeds 18℃, the development is rapid, the image density increases rapidly, the contrast is enhanced, the gray scale begins to increase in the later stage, the color tone is cold, and the hierarchical details are lost. Higher developer temperature will make the latex film of film and photographic paper fall off. Fixing solution has high temperature, fast fixation and fast dissolution of unexposed silver halide.

When the temperature is low, the development is slow, and the reduced silver particles are fine and rich in layers, but the contrast is low and the image is gray. The gaze is slow.

If the temperature difference between developer, fixer and fixer is large, the emulsion layer on the film will crack into ceramic cracks similar to that, so the film image will be scrapped. Of course, the existence of images that unexpectedly need this effect is not ruled out, because some darkroom technologies especially need to add the moire effect of images.