Third, the ink viscosity is too large
After the paper receives the ink with high viscosity from the blanket, the ink on the paper surface is relatively resistant to the residual ink on the blanket when the pressure is applied, so that the peeling resistance between the surface and the bottom of the paper is unbalanced and the surface of the paper is torn. , face and bottom separate two skin phenomenon.
Solution:
1. To reduce the viscosity of the ink, add 2% of the detackifier to the ink used, or add No. 6 varnish to the ink. There are two roles. First, it plays a dilute effect in the ink; Second, it reduces the viscosity of the ink, increases the ink flowability, and improves the printability of the ink.
2. When printing on-site version of the product, try to use the original barrel ink, without adding the ink, add some detackification agent, anti-adhesive agent: do not add dry oil when the weather is hot. When printed products are often easy to appear back sticky, visco-rubber, paper separation problems, often using the method of dusting to solve. Although the printed anti-adhesive dirty dusting agent is a pure plant material, the dispersion and fluidity are good, but the use of dusting agent will affect the gloss of the printed product, make the ink color not bright, and pollute the environment, but also have an impact on the accuracy of the offset press .
3. Ordinary whiteboard paper surface roughness, loose texture, greater ink absorption, flatness is poor, therefore, full-print version should be printed on the ground background, dark color after printing, background color to be deeper, printed thin, ink color Should not be too large. If the smoothness of the white paper is good, then when printing on the ground, it is necessary to print the dark color first, and the amount of ink is printed on the foot so that the back surface will not be dirty, and then the background color will be overprinted, and the print finish will be compared. Good, at the same time, pay attention to the balance of ink and ink when offset printing, and control the size of the printing plate surface moisture.
4. When the weather is hot in summer, when the white paper is printed in monochrome, the paper suffers from uneven moisture content, uneven wrinkling, poor paper surface strength, etc., which causes hair loss and powder removal. At this time, the air can be printed first. , which can solve this kind of phenomenon.
Source: Guangdong Printing
Ink Well Pad Printer
Open ink tray pad printer adopt ink well supply system, operation simple, low price, suitable for Asia and Africa market.We provide various pad printer for industry area: Electron, Toys, hardware, gift, stationary, Auto parts, Mobile, computer, Plastics package, wooden, leather, rubber, Household appliances,Daily necessities, hotel supplies, Tourism supplies, cosmetic, office supplies.Photographic equipment, glasses supplies, Jewelry Accessories, Decorations, medical supplies, sports equipment, health products,ETC.
Pad Printing Process
1.Coating: Coating ink onto the pad plate by an ink roller or sealed cup
Opened-inktray pad printer stores ink in the end of the tray, when the roller slide into the ink and out will bring ink to the pad plate; sealed cup pad printer stores ink in the sealed cup. Sealed cup moves from back to forth and brings ink into the cave of pad plate.
2.Removing ink: Removing ink on the pad plate with steel blade or sealed cup
The ink in the cave of pad plate will remain. Removing the ink on the surface of pad plate completely is very important. when the ink remain on the surface of pad plate, pad will pick up them with the ink in the cave of pad plate, printing picture will be not same as standard document. Removing ink with steel blade on inktray pad printer and Removing ink with Sealed cup on Sealed cup pad printer.
3.Picking up ink
Pad above the pad plate press down and pick up the ink from the cave on the pad plate, then rise up. The ink will be transfered onto the pad surface because of pressure. Please make sure the size of rubber pad is matched with logo.
4.Moving:
Pad move to the position above the working table and substrate. There are two kinds of moving way: one is parallel moving, the other is turning moving. Most of KC brand pad printer drives with pneumatic -controlling.
5.Printing:
Pad press down to contact the substrate and print inks onto substrate. Substrate is installed on the fixture and the fixture is installed on the working table of pad printer.
Ink Well Pad Printer
Ink Well Pad Printer,One Color Pad Printer,Multi-Color Pad Printer,Cylinder Pad Printer
KC Printing Machine (Group) Limited , http://www.kcautopm.com