In the process of CTP output, there are many precautions, I will list them here.
1. The file to be exported must be copied to the designated folder, which is mainly for the safety of electronic files on the network; at the same time, the related files must not be placed and deleted at will, which is convenient for later revision; after the file is entered, it should be recorded, It is convenient for future inquiries; the operator should have a written handover registration for each input file, output printing plate and quantity, etc .; the printing plates that have been checked should be placed neatly to avoid confusion and scratches; each set of plates should be marked with a name, Number etc .;
2. Before outputting the printing plate, you should first check the working state of the developing machine to see if there is enough developer and replenisher. Whether the temperature of the developing solution and the developing speed are correct, if they cannot meet the requirements, they should be adjusted according to the regulations;
3. Before the plate is exposed, check the plate for defects, such as whether the plate is scratched, etc .;
4. The operator should avoid contaminating the plate, and should handle the plate lightly;
5. After the CTP output is completed, the quality of the plate should be tested, which can be measured by x-Rite, to ensure that the density of the blank part should be less than 0.29; ;
6. For printing plants that have strict requirements on the linearity of the plate, when measured by Ic-Plate after development, the percentage of corrected dots at 50% dots exceeds ± 3% and cannot be restored to the original standard by adjusting the developing time and temperature , The developer should be replaced;
7. The quality requirements for the layout after development;
A. There should be no scratches on the layout; B. There should be no dirty spots on the layout; C. The layout should be fully developed and look very clean; D. Whether the overprint and corner lines of the layout are complete. E. Check whether the bite is correct;
8. After the development machine is turned off and then turned on, it is necessary to rinse at least 5 waste plates to make the development machine reach the best working state and ensure the development quality;
9. The temperature control of the developing solution is very important. If the temperature difference is ± 0.5 ° C, the displayed plate point will change. The method of combining the panel display temperature with the digital thermometer measurement should be used to strictly control and achieve the development tank. The temperature in the four corners is the same, the error should not exceed ± 0.5 ℃;
10. If the developing machine is not used for a long time, the developer can be put back into the plastic bucket for sealing and storage. When it is used, it can be drawn into the developing tank to continue to use;
In addition to the above, during the CTP process, regular maintenance of the CTP equipment is also required, such as checking whether the filter element is clean, if it is a bit dirty, it must be replaced in time; regular cleaning of related components and so on.
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