Gold ink printing problems should pay attention to 10
Gold ink printing problems should pay attention to 10
1. UV inks
Absorption of UV curing inks for the ink, coating laminating needs as many cards, the performance of their own particular importance. The key has two points: First, take high temperature, high pressure, high temperature in the laminating machine, high pressure does not change color, no fade; second, and plastic film adhesive force between the larger, the minimum standard required to achieve the 6N pull. In addition, the selection system used in UV ink cards are also quite critical, in addition to ensuring the quality indicators of ink itself, but also UV light wavelength must match the printer. Since many manufacturers are issued as a manuscript for color inkjet printing, it is recommended as selection criteria when choosing ink hue of yellow, magenta. Blue ink. In addition, deployment of special color ink, try to choose low viscosity and good ink flow.
2. Special plates
Special UV offset printing plates wear resistance, and India, half-way down, is not required to protect plastic, old can be re-used, and very suitable for the transfer of UV inks, printing down high rate of recovery when the network is basically to reach 2% of the network no loss, 98% of the network can be resolved. Taking into account the printing costs, the short version for smaller-volume live, text version of the proper use of common version, but easy to wear version of film, printing to pay more attention.
3. Blanket and bag lining
To ensure the best transferability of UV ink and reducing network is best to use air-cushion blanket, because it has good acid resistance, oil resistance. Hydrophobicity and good ink transfer properties, to ensure minimum distortion of dot printing process, printing graphic clear, high-profile part of the reproduction is good, little wear plate.
Rubber roller bag lining the better use of neutral tend to be hard, because the surface of PVC sheet material such as rough, easily leading to the printing dot gain rate, with a neutral liner rigid and package will enable network clear, bright and clean, good reproducibility, graphic changes in the geometry of a small, graphic and print runs the width of the increment is relatively small.
4. PVC card sheet
PVC sheets are light and so surface and matte surface of points, light surface more smooth, matt surface is rough, select the print side is very important in many print quality problems can be avoided. Usually PVC sheets matt surface such as the printing surface, printing ink to ensure the field is not galling, network firm, inks and materials, strong adhesion between the ink and not full of white dew point. In addition, the printing pressure appropriate than the standard pressure increased 0.02 ~ 0.05mm.
5. Supplementary material
UV offset printing used in car washing water, blanket cleaning agent. Cleaner and so the best choice of special products, which for UV ink roller. UV and UV printing blanket version of the life and performance are particularly important. While the cost will be higher, but can flexibly according to actual situation. Ensure that once a week roller; in shutdown blanket washing agents with special back, so can guarantee the effective elastic blanket, but also to re-boot to ensure consistent color balance and to avoid chromatic aberration.