Why do pre-flight processing before CTP is published?

The pre-flight that is said now is not related to the aircraft. In the printing industry, it refers to pre-press pre-inspection work. In the CTP machine, it is to look at the problems before the output. But why do we have to make a pre-flight?

In 1997, the GATF (American Printing Technology Foundation) conducted a survey of common problems in digital documents and found that 85% of the digital manuscripts provided by customers were wrong. There are usually some problems in digital files: lost words, missing images, incorrect colors, incorrect scan mode, improper page settings, incorrectly sized bleeding, incorrect trapping, low or too high image resolution. Many customers admit that they are used to making files with software such as Word or PowerPoint, printing files on their own inkjet printers, unfamiliar, and not accustomed to using professional typesetting software such as PageMaker or Quark, and do not know how to make documents according to printing requirements. . Coupled with the fact that some printing customers can easily change the printing requirements in the middle, it is easy to cause rework of the printing plate. In this case, the error correction of a typical print job becomes a waste of time, and both the customer and the printer have to negotiate.

Most preflights can also detect problems such as insufficient resolution, OPI missing images, separations, and spot color processing. Therefore, in order to ensure the reliability and stability of printing, the following functions should be pre-checked:

1. Detecting trapping;

2. Trap processing, young line trapping protection;

3. Young line fine word detection;

4. Confirmation of color separation, four colors or with spot color processing;

5. Picture resolution detection;

6. OPI function detection;

7. Page size detection.

Only after pre-flight can we avoid the problematic CTP version, so we must pre-flight before printing.


The pre-flight that is said now is not related to the aircraft. In the printing industry, it refers to pre-press pre-inspection work. In the CTP machine, it is to look at the problems before the output. But why do we have to make a pre-flight?

In 1997, the GATF (American Printing Technology Foundation) conducted a survey of common problems in digital documents and found that 85% of the digital manuscripts provided by customers were wrong. There are usually some problems in digital files: lost words, missing images, incorrect colors, incorrect scan mode, improper page settings, incorrectly sized bleeding, incorrect trapping, low or too high image resolution. Many customers admit that they are used to making files with software such as Word or PowerPoint, printing files on their own inkjet printers, unfamiliar, and not accustomed to using professional typesetting software such as PageMaker or Quark, and do not know how to make documents according to printing requirements. . Coupled with the fact that some printing customers can easily change the printing requirements in the middle, it is easy to cause rework of the printing plate. In this case, the error correction of a typical print job becomes a waste of time, and both the customer and the printer have to negotiate.

Most preflights can also detect problems such as insufficient resolution, OPI missing images, separations, and spot color processing. Therefore, in order to ensure the reliability and stability of printing, the following functions should be pre-checked:

1. Detecting trapping;

2. Trap processing, young line trapping protection;

3. Young line fine word detection;

4. Confirmation of color separation, four colors or with spot color processing;

5. Picture resolution detection;

6. OPI function detection;

7. Page size detection.

Only after pre-flight can we avoid the problematic CTP version, so we must pre-flight before printing.


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