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About the causes and solutions of knife line in the process of gravure printing

About the causes and solutions of knife line in the process of gravure printing

Gravure printing often has many quality failures, of which the generation of knife line is one of the most common failures, the generation of knife line to scrap the product, resulting in economic losses. In this paper, from a professional point of view, combined with the actual production experience, the five major factors affecting its production are analyzed and summarized in detail, and the corresponding solutions are proposed.

Time

2017-04-21

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Analysis of the causes and countermeasures of common problems in gravure printing from the process perspective

Analysis of the causes and countermeasures of common problems in gravure printing from the process perspective

Common problems in the processing of printed materials are: print line marks (knife wire, knife line), poor ink adhesion, dark tone level, poor gloss, color difference, half point, leakage, blocking plate, pinhole, turtle pattern, residual solvent, etc.. In this article, we will take poor gloss and residual solvent as an example, and briefly explain the causes and solutions from the perspective of the printing process.

Time

2017-04-21

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The five basic requirements of the printing plate cylinder, must do!

The five basic requirements of the printing plate cylinder, must do!

As the saying goes, the print "three points in the printing, seven points by the plate". What to pay attention to during the printing plate making process, how to choose and test the plate cylinder, is the premise of the quality assurance of printed products. This article will introduce the basic requirements for gravure printing cylinder selection and processing, plate plating and cylinder grinding, for reference.

Time

2017-04-21

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Fine gravure printing is three parts by printing, seven parts by plate making!

Fine gravure printing is three parts by printing, seven parts by plate making!

It is often said that "seven points by the plate, three points by the printing", no doubt that the quality of the printing plate is critical for gravure printing. Among them, the plate cylinder processing accuracy on the impact of overprinting is particularly important.

Time

2017-04-21

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Application of pre-registration technology in gravure printing presses

Application of pre-registration technology in gravure printing presses

The concept of pre-registration technique: First I want to explain the concept of "pre-registration", so what is "pre-registration"? We believe that the first printing material is not stretched, pre-loading plate, automatic pre-alignment, open horizontal alignment, longitudinal addressing can play automatic speed up register.

Time

2017-04-21

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Gravure printing machine common eight kinds of mechanical failure and elimination methods

Gravure printing machine common eight kinds of mechanical failure and elimination methods

凹印机结构较为复杂，维修专业性强，除正常的操作和维护以外，设备的调整、修理等工作应委托专业的技术人员进行。当故障发生时技师应能进行简单的分析，并采取保障人身安全、产品质量以及保护企业财产的得当措施。

Time

2017-04-21

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Flexible packaging lamination generates air bubbles, five kinds of situations a net!

Flexible packaging lamination generates air bubbles, five kinds of situations a net!

In the lamination process, as long as the two layers of film are not completely laminated, there is a difference in transparency, and when the lamination is laminated, the water flow between the film layers is not flat, or the surface energy of the film is not reached, or the amount of glue coating is insufficient, etc., bubbles will follow. In this paper, we mainly elaborate on five kinds of bubbles generated by insufficient glue application, poor drying, blocking, thicker film from the laminating hot rollers with air, uneven laminating hot rollers and pressure rollers, etc., and detail the solutions.

Time

2017-04-21

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Dry laminator tension setting law, simple and practical!

Dry laminator tension setting law, simple and practical!

The tension value is set according to the properties of the substrate, such as the substrate thickness, tensile strength, hardness, etc., and the specifications of the film roll. Generally speaking, the initial tension of the substrate with high tensile strength, hardness and thickness is relatively large (e.g. PET), while the initial value of the tension of the substrate with low tensile strength and high stretch rate is relatively small (e.g. BOPP, PE); the wider the film roll, the larger the initial tension. In addition, the following factors will also affect the tension control.

Time

2017-04-21

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