How can self-adhesive label coated paper ensure the color accuracy of printing

To ensure the color accuracy of self-adhesive label coated paper printing, it can be controlled and optimized from the following aspects:

First, establish a color management system

Formulate a clear color standard: When printing a label product for the first time, the color upper limit, standard and lower limit of the label product should be formulated, and determined as "proof" after customer confirmation. In subsequent production, the standard color of the sample is used as the basis to ensure that the color fluctuation does not exceed the specified upper and lower limits.

Strict implementation of sample signing, inspection and sampling system: the color inspection items are added to the first and last part of the sample signing system in order to control the color difference of labeled products. At the same time, strengthen inspection and random inspection, timely find and deal with label products beyond the reasonable range of color difference.

2. Use standard lighting sources

Standard lighting sources should be used in the printing shop and quality inspection area to ensure that the light source is stable and standard at any time when the color inspection is performed. This can effectively avoid the problem of print color difference caused by non-standard lighting sources.

Third, choose the right ink and paper

Use ink with stable quality: Choose ink produced by regular manufacturers, pay attention to the shelf life of ink, update inventory in time, and avoid using expired ink.

Choose the right paper: The absorption of coated paper is small, and the impact on the printing color is also small. When selecting paper, factors such as its absorption and whiteness should be considered to ensure the accuracy of printing color.

Fourth, optimize the printing process parameters

In the printing process, the printing pressure, speed, ink amount and other process parameters should be adjusted according to the actual situation to obtain the best printing effect. At the same time, regular maintenance and maintenance of the printing equipment to ensure that the equipment is in the best working condition.

5. Color correction and color tuning

Color correction is carried out before printing to ensure accurate overprinting between colored plates; Real-time color adjustment during the printing process, adjusting the ink ratio and color density according to the proof or customer requirements.

In summary, through the establishment of a color management system, the use of standard lighting sources, the selection of appropriate ink and paper, the optimization of printing process parameters and color correction and color adjustment measures, you can effectively ensure the color accuracy of self-adhesive label coated paper printing.