For long-run printing, the life of the CTP version is a very important indicator, related to production costs and production efficiency. The plate making process has an impact on its life.
1. If the optical path of the CTP platesetter is not cleaned for a long time or the focus is not correct, the laser energy output on the surface of the plate will be lower than the laser energy value required for the photopolymerization of the plate, so the photosensitive layer on the surface of the plate cannot The photopolymerization photochemical reaction is completely carried out, so that the photosensitive layer in the image portion cannot be completely crosslinked, thereby causing a decrease in life. Therefore, the plate light path is cleaned and calibrated regularly to ensure that the laser energy on the surface of the plate is correct to ensure a normal life.
2. The plate can not be properly attached to the drum surface in the CTP plate making machine, which will cause the laser energy on the surface of the plate to be incorrect, which will also lead to a decline in life.
3. The important function of pre-heating of the plate-making machine is to further cure the photosensitive layer on the surface of the plate material which has already produced photochemical reaction on the aluminum substrate of the plate material, thereby improving the life. If the preheating temperature is too low, the photosensitive material does not cure well on the surface of the plate, resulting in a decrease in life.
4. During the printing process, the developer concentration, the temperature is too high, or the development time is too long, and the corrosion of the photosensitive layer causes the life to decrease.
5. If the amount of water washed in the post-printing process is insufficient, the residual developer will continue to erode the photosensitive layer and cause a decrease in life.
6. Some protective glue will react with the photosensitive layer. If there is no protective glue that can properly use CTP plate (original protective glue is recommended), it may lead to insufficient life.
7. If the temperature and humidity of the CTP room are extreme, it will also affect the life of the board.
8. If the temperature is too high or too low in the baking plate, the time is too long or too short, which will lead to a decline in life.
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