The color management in the CTP process is the focus and difficulty of the CTP technology. The ICC characteristic curve that accurately reflects the characteristics of the device determines the effect of color management. Therefore, the generation and application of the ICC characteristic curve have become the top priority of color management.
First of all, we know that the current purple laser CTP due to its photosensitive characteristics and the characteristics of the plate processor determines linearization is an indispensable part. Some users always have a skeptical attitude towards the linearization curve when using it, and they are not very confident about the accuracy of the device's linearity. After a lot of practice, this kind of worry is completely unnecessary. Some monitoring methods in the use process can fully guarantee the accuracy of the outlet restoration.
1. Environmental temperature and humidity control. In a safe photosensitive environment, strict control of temperature and humidity is very beneficial to the reproduction of CTP network points. Generally, it is necessary to ensure that the ambient temperature is around 23 and the humidity is between 50 and 60.
2. Precise control of PH value. The developer of the processor is changed regularly as required. The developer in the developer tank of the processor is measured before publication every day to ensure that the PH value of the developer is within 12 ± 0.25 at 28 ° C. If not enough, add supplemental fluid separately.
3. Measurement by plate tester. In order to verify the accuracy of the value of the published outlets, a gray ladder ruler can be attached to the bending position on the plate. After the printing is completed, the actual outlet value is measured to check the difference from the required value, but pay attention when measuring The compared value is the value after adding the inverse compensation curve.
After ensuring that there are no problems with the above three points, the obtained dot value is completely no problem. They have become an advantageous weapon for the restoration of control outlets.
Of course, when the PH value reaches a relatively stable state, it also needs a period of monitoring and adjustment. Due to the difference in the size and environment of the user's plate material, the period before installation may be a process of exploring the PH value. During this period of time, the real-time monitoring of the publication will be done, and we can find a suitable amount of supplemental liquid. Within a certain period of time, if the PH value does not change significantly during the publication process, it indicates that the adjustment has met the standard. The user can follow the hardware engineer to learn the adjustment skills, and can make adjustments if necessary.
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