1. Plate problem. In the case of drying the printing plate using sublimation thermal transfer ink, the light portion of the blank portion is not completely broken or the photosensitive layer of the blank portion is not washed due to insufficient exposure or insufficient development. Thick version of the dirty points, drying machine on the glass dirty spots, baking version of the front page for the thorough cleaning or protective agent coating uneven, uneven rubbing will cause greasy.
Serious greasy , only re-copy. Light greasy, or only individual parts, can be on the plate for fat reduction treatment, and in the fountain solution and then put some gum arabic.
2. Too large pressure between the plate cylinder and the blanket cylinder . Because the pressure between the rollers is too large, the friction on the layout increases, the layout wear dirty.
If the liner distribution is unreasonable, resulting in increased sliding between the roller volume, to arrange the lining; Pressure, appropriate to adjust the amount of compression. Through the scientific experiments, the soft lining control is about 0.25mm, the neutral lining is controlled at about 0.15mm, and the hard lining is controlled at about 0.08mm.
3. Ink roller and plate pressure is too large, sliding friction increases, will affect the sublimation thermal transfer ink printing plate resistance to India, network expansion, but also the formation of dirty and greasy. Can be adjusted with the plug pressure roller pressure, ink roller pressure on both sides to be consistent. Can also measure the contact width, monochrome lithographic printing press from the ink roller to the ink roller and the printing plate contact width is generally 6mm, 5mm, 4mm, 4mm; multi-color lithography presses are generally 4mm, 4mm, 3mm, 3mm.
4. ink roller for a long time under pressure rolling and fountain solution, ink contact, easy aging, less elastic, sublimation heat transfer ink transfer effect will be worse, the blank part of the plate from the dirty into greasy. After each color change must wash the ink roller surface residual ink skin, ink. The pressure of the inking roller should be appropriate and the aging layer should be found to be wiped off, and when the ink is removed, the ink is removed and the surface hardened layer is removed.
Sales Manager
Ella Yang
Henan Zhongliqi Printing Material Co.,Ltd
Address: Beihuan Road,Muye District,Xinxiang City,Henan Province,China
Fax:+86-0373-2611121
Whatsapp/Skype:+8615737315250
Wechat: Ella-15737315250
QQ: 3547723404
