In the printing plate making process, printing is an extremely important process. If you choose and use the printing light source correctly, it is of great significance to improve the quality of the printing plate, effectively save energy, simplify operation, maintain the health of the operator, and reduce costs. Due to the different types of photosensitive resin photosensitive materials, it is necessary to choose to use a light source that meets the needs of various photosensitive materials. The light source used for printing should have the following characteristics:
1. The wavelength emitted by the light source should be compatible with the absorption characteristics and color sensitivity of the photosensitive material.
2. The luminous efficiency of the light source should be high and the luminous intensity should be large. Because under other conditions unchanged, the higher the luminous efficiency of the light source, the greater the luminous intensity, the corresponding illuminance is also greater, so the time for the photosensitive material to obtain the same exposure is shorter.
3. The UV component in the spectrum will cause damage to people's eyes and skin, so it should be masked with a sunscreen that absorbs ultraviolet light.
4. The light source will generate heat during use. Use a light source with as little thermal radiation as possible.
5. Good workability and economy, to ensure that the light source can be repaired and replaced, and the price is cheap.
6. High luminescence stability, that is, luminous intensity and spectral distribution are relatively constant.
7. The light energy distribution is uniform.
8. It can ensure good reproducibility of the printed image after printing.
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