Printing plate structure and manufacturing method thereof

A technology of printing plates and dots, which is applied in the field of printing plate structure and its production, can solve the problems of printing quality degradation, affecting printing quality, increasing dot printing expansion value, etc., to achieve the effect of reducing deformation, improving resistance rate and exquisite printing patterns

Active Publication Date: 2015-11-25
上海英耀激光数字制版有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As the printing progresses, the printing plate is used for a long time, and the top printing plate dot 105 of the raised point 104 will be worn out. Since the raised point 104 is a tapered structure with a small upper part and a larger lower part, as the wear and tear progresses, the printing plate dot 105 at the top of the raised point 104 will wear out. The area of ​​dots 105 of the plate will gradually increase, resulting in larger dots printed on the substrate after final printing, which will increase the expansion value of dot pr

Method used

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  • Printing plate structure and manufacturing method thereof
  • Printing plate structure and manufacturing method thereof
  • Printing plate structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0058] Example 1

[0059] Satellite-type flexographic plates for film printing that use lasers to directly engrave rubber plates.

[0060] This printing plate adopts the RIP precision of 2400PPI, the number of screen lines is 150LPI, the angle is 45°, and the dot type is dots for screening. The relief height of the raised points is 0.55mm. According to the RIP accuracy and the number of screen lines, the number of tones between 0-100% is calculated as 256. Determine the engraving contour of 256 tones according to the 8BitTIFF engraving file of the original laser machine.

[0061] Improve the printing resistance rate of the printing plate, prevent the printing plate from increasing the dot printing expansion value after wear, and add a cylindrical stigma with a height of 8μm on the top of the raised points of each tone. The printing plate is used for printing plastic film. The printing plate is smooth and not easy to wear. It is more appropriate to choose a middle lower value of 8μ...

Example Embodiment

[0065] Example 2

[0066] A steel-based relief plate for can printing that uses a laser to directly engrave rubber plates.

[0067] This printing plate chooses the RIP precision of 5080PPI, the number of screen lines is 200LPI, the angle is 45°, and the dot type is dot for screening. The relief height of the raised points is 0.4mm. According to the RIP accuracy and the number of screen lines, the number of tones between 0-100% is 646. Determine the engraving outline of 646 tones according to the 8BitTIFF engraving file of the original laser machine.

[0068] In order to improve the printing durability of the printing plate and prevent the printing plate from increasing the dot printing expansion value after it is worn out, a 6μm cylindrical stigma is added on the top of the raised points of each tone. Since the printing plate is used for aluminum cans, its surface is smooth and it is not easy to wear the printing plate, it is more appropriate to choose a smaller value of 6μm.

[00...

Example Embodiment

[0072] Example 3

[0073] A flexographic plate for unit printing that uses laser to directly engrave rubber plates.

[0074] This printing plate selects 4000PPI RIP precision, screen line number 175LPI, angle 37.5°, dot type is round square dot for screen. The relief height of the raised points is 0.60mm. According to the RIP accuracy and the number of screen lines, the number of tones between 0-100% is 524. Determine the engraving outline of 524 tones according to the 8BitTIFF engraving file of the original laser machine.

[0075] In order to improve the printing durability of the printing plate and prevent the printing plate from increasing the dot printing expansion value after wear, a 14μm cylindrical stigma is added at the top of each tone. Since the printing plate is used for printing cardboard, its surface is rough and easy to wear the printing plate, it is more appropriate to choose a middle value of 14μm.

[0076] The height of the column head of the increased cylinder is ...

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Abstract

The invention discloses a printing plate structure and a manufacturing method thereof. According to the structure, embossed type protruding dots composed of different proportions of screen dots are distributed on the printing plate. The protruding dots are of a big-end-down frustum shape. The tops of the protruding dots are provided printing plate screen dots forming printing screen dots on a printed material. The printing plate screen dots extend upwards to form post heads. The section shape of the whole bodies of the post heads is the same as the shape of the printing plate screen dots. In addition, the embossing heights of the protruding dots where all printing plate screen dots below the standard tone are located are sequentially reduced according to the linear relation. The printing plate structure is used for printing and has the beneficial effects of improving printing resistance rate, preventing the expansion value of the printing screen dots from being enlarged, preventing small printing screen dots from being expanded irregularly and the like. The printing quality is improved, and more artistic patterns can be obtained.

Description

technical field [0001] The invention belongs to the technical field of printing, and relates to a printing plate structure and a manufacturing method thereof. Background technique [0002] The printing process determines that the printing can only use dots to reproduce the continuous tone level of the original. If the image is enlarged, it will be found that it is composed of countless printing dots of different sizes. We can see that although the printing dots are different in size, they all occupy the same space. This is because once the original image is screened, the image is divided into countless regularly arranged printing dots, that is, the continuous tone image information becomes discrete. dot image information. The larger the printing dot, the darker the color and the darker the level; the smaller the printing dot, the lighter the color and the brighter the level. [0003] The shape of the printing dots can be divided into round, square, chain, hexagonal, etc. a...

Claims

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Application Information

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IPC IPC(8): B41N1/00B41C1/05
Inventor 曹员珍范崟
Owner 上海英耀激光数字制版有限公司
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