Analysis: What are the requirements of Cigarette Box-UV offset printing for printing materials

Feb 09, 2022

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For Cigarette Box-UV offset printing, after understanding the necessary configuration of the offset press, let's take a look at the requirements for printing materials.

1. UV ink

UV ink is a light-curable absorbing ink, because many cards need lamination, its own function is particularly important. The pivot has two points: first, it needs to be resistant to high temperature and high pressure, and it will not change color or fade under the high temperature and high pressure of the laminator; second, the bonding force between the plastic film and the plastic film should be large, and the minimum scale needs to reach 6N tensile force. In addition, the selection of UV ink for card making is also a key point. In addition to ensuring the quality index of the ink itself, it must also match the wavelength of the UV lamp of the printing machine. Because many manufacturers use color inkjet manuscripts as manuscripts for printing, it is recommended to choose yellow and magenta with standard hues when purchasing inks. Blue ink. In addition, when formulating spot color inks, try to choose inks with low viscosity and good activity. European Ake inks are better.

2. special plate

The special printing plate for UV offset printing is wear-resistant and durable. No protective glue is required when the machine is stopped halfway. The old version can be used again, which is very suitable for the transfer of UV ink. Not lost, 98% of the dots are distinguishable. At present, the quality of the Fuji UV version in Japan is relatively good. Considering the printing cost, the text version can be appropriately used for the short version with small batches. However, the version film is very easy to wear, so pay more attention when printing.

3. Blankets and linings

In order to ensure the best transferability and dot reduction of UV ink, it is best to use an air-cushion blanket, because it has good acid resistance and oil resistance. Hydrophobicity and good ink transfer performance can ensure that the dot deformation is minimal during the printing process, the printed graphics and texts are clear, the high-profile department has good reproducibility, and the printing plate wear is small.

It is better to use neutral and hard linings for rubber rollers. Due to the rough surface of PVC and other sheets, it is easy to lead to a high rate of increase of printing dots. Using neutral and hard linings can make the dots clear, smooth and reproducible. , the geometric shape of the graphics changes little, and the width increments of the graphics and the printed sheets are relatively small.

4. Sheets such as PVC

PVC and other sheets have a glossy surface and a matte surface. The glossy surface is flat, and the matte surface is rough. It is very important to choose the printing surface, which can avoid many printing quality problems. Usually, the matte surface of PVC and other sheets is used as the printing surface to ensure that the clear ink is not bruised or dotted when printing, the adhesion between the ink and the material is strong, and the ink is plump and does not reveal small white spots. In addition, the printing pressure is appropriately increased by 0.02 to 0.05 mm compared with the standard pressure.

5. Auxiliary materials

Car wash water and blanket cleaning agent for Cigarette Box-UV offset printing. It is best to use special products for cleaning liquid, etc., which is for UV ink rollers. The service life and performance of UV blankets and UV printing plates are particularly important. Although the cost will be higher, it can be used flexibly according to the actual situation. Ensure that the ink roller is cleaned once a week; use a special recovery agent to clean the blanket when the machine is stopped, which can not only ensure the effective elasticity of the blanket, but also ensure that the color is balanced and consistent and avoids color difference when the machine is restarted.