News Center

News Center

Check category
/
/
/
Rotary printing press manufacturers introduce how to determine the amount of powder spraying in flexographic printing presses

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:

(Summary description)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.

Rotary printing press manufacturers introduce how to determine the amount of powder spraying in flexographic printing presses

(Summary description)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.

  • 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.

  

img

 

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.

Recommended News

Switchboard:

hd@shenzhenhuada.com

We look forward to hearing from you

img

E-mail:hd@shenzhenhuada.com
Address:No.101, No.7 workshop, No.28, Jingsheng Road, Tongle community, Baolong street, Longgang District, Shenzhen, Guangdong

 

img
img
img

Copyright © Shenzhen Huada Huahui Machinery Co., Ltd.