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Rotary printing press manufacturers introduce how to determine the amount of powder spraying in flexographic printing presses
- Categories:Company News
- Author:Shenzhen Huadahuahui Machinery Co.,Ltd.
- Origin: http://www.shenzhenhuada.com
- Time of issue:2022-09-09 18:00
- Views:
Rotary printing press manufacturers introduce how to determine the amount of powder spraying in flexographic printing presses
- Categories:Company News
- Author:Shenzhen Huadahuahui Machinery Co.,Ltd.
- Origin: http://www.shenzhenhuada.com
- Time of issue:2022-09-09 18:00
- Views:
How to determine the amount of dusting powder is a more difficult problem, because there is no specific data. The amount of powder should not be too small or too much, which can only be determined by the operator's continuous exploration and experience accumulation. Then, let the rotary printing machine manufacturer introduce how to determine the amount of powder spraying in the flexographic printing machine.
1. The thickness of the ink layer of the product
The thicker the ink layer, the more likely the product will be dirty, and the amount of powder spraying will be larger, and vice versa.
2. The height of the stack
The height of the paper pile is getting higher and higher, the gap time between the papers is smaller, and the molecular bonding force between the surface of the ink film on the printed sheet and the next printed sheet is greater, which is more likely to cause the back of the printed product to be dirty, so the amount of powder spraying will increase. To increase.
3. The nature of paper
Generally speaking, the rougher the paper surface is, the more beneficial it is to improve the penetration of the ink and the drying of the oxidized conjunctiva, and the amount of powder spraying can be reduced or not used.
However, for rough art paper, paper with opposite polarity static electricity, and acidic paper, the surface of the paper is not smooth enough, which is not conducive to the drying of ink, and the amount of powder used should be appropriately increased.
4. The nature of the ink
Different types of inks have different compositions, proportions, drying speeds and powder spraying dosages of binders and pigments.
In the printing process, some varnishes or detackifiers are often added to the ink to temporarily adjust the printing suitability of the ink due to the needs of the product. The purpose is to reduce the viscosity of the ink, which will cause the cohesion of the ink itself. The drying time of the ink increases the risk of smearing on the back of the product. Therefore, the amount of powder spraying should be increased appropriately.
5. pH value of fountain solution
The smaller the ph value of the fountain solution, the more serious the emulsification of the ink, the more likely the ink cannot be dried in time, and the amount of powder should be appropriately increased.
6. Printing speed
The faster the printing press, the shorter the embossing time, the shorter the penetration time of the ink to the paper, and the less the powder falling on the paper. In this case of development, the amount of powder spraying should be considered to increase as appropriate.
The above is how to determine the amount of powder spraying in the flexographic printing machine introduced to you by the manufacturer of the rotary printing machine. I hope you can have a further understanding of it after reading it.
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Rotary printing press manufacturers introduce how to determine the amount of powder spraying in flexographic printing presses
The company's main products are intermittent rotary printing machine, CNC oblique pressure type self-adhesive label printing machine, high-speed single-seat die-cutting machine, magnetic circular knife die-cutting machine, quality inspection machine, print
Shenzhen Hanyan Group Co., Ltd. was founded in 1998 and renamed from the original Huahui Machinery Factory. It specializes in the research, development, production and sales of high-quality label...
The 2017 Asia International Label Printing Exhibition ended successfully, Huada Machinery looks forward to meeting you again next year!
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