What should be noted for book printing
03-12-2020 11:45:15


In the process of printing, the most basic requirement is that the rules should be positioned accurately. I believe you all know the importance of this.  Let's take the printed cover as an example to discuss the matters that should be paid attention to in printing.

 

For book printers in china, when printing cover the printing color is required to be stable; in addition, due to the post-press processing process often covered film, UV glazing and other special processes, so the rules of stability requirements are higher.

 

The importance of rules

1. hot stamping rules

The hot stamping content of the cover is generally not intermingled with the printed content, but the hot stamping content and the printed content have a certain corresponding relationship, so the rule edge of hot stamping is the rule edge of printing, so as to ensure the consistency of the hot stamping position of the same batch of live parts.

2.The rules for UV

Book printers in china, rules for UV and the rules for the light version must be the same. UV need on the smooth oil of the graphic and text content and printing content part of the requirements. Cover paper will sometimes use more loose special paper, printing is very easy to deform, so printing rules and UV glazing process rules must be unified. If there is a phenomenon of jumping rules in the printing process, the UV must be carefully classified according to the situation of jumping rules in the light of the printing, in batches to light up, and adjust the position of the UV light version.

3. stamping rules

If the post-press process needs to be the same position of a certain print the same content of two special process superposition. And this requires that the overfitting error be less than 0.01 mm, so hot stamping rules, punch rules and printing rules must be consistent.

4.UV light and embossed

Generally, embossed will be done after UV. The error of the UV glazing process may make the UV glazing misalignment less obvious due to the bumping of the convex content.

 

Attention to cover printing

 

Usually, book cover used paper quantitative in 157 g/ square meters above, special paper quantitative in 135 g/ square meters above. Because the paper is thicker, especially the change of water absorption of special paper when printing press is larger, the deformation of paper in printing is larger, and the accuracy of regular drawing paper positioning is particularly important.

 

Because the same pattern on the cover may require two or three post-press processing, we should try to make the content that needs to be post-press processing close to the regular edge, so that the post-press positioning of the edge gauge position and printing edge gauge position consistent and accurate.

 

When cutting paper, it is required to be accurate, neat, small error, and the cutting position of the mouth and the edge of the edge gauge should be standardized and neat, so as to ensure the correct positioning of the rules when printing the cover.

 

book printers in china need to control the printing process strictly. One is to ensure ink balance, in the premise of ensuring printing quality, the smaller the amount of water required is better; the other is to control workshop temperature and humidity, temperature 20~25, humidity 60%~70%; third, in the printing process, side gauge drawing paper to be stable, bottom gauge to be stable; fourth, the whole batch of cover color should be consistent.

In fact, the implementation of post-press processing can not be separated from the early plate making and design, but also from the precise control of printing links, but also from the strict control of the accuracy of the rules when the post-press process special treatment. Only these three aspects have been done to ensure the quality of post-press processing.


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