How to avoid the color difference problem in the printing process of self-adhesive labels

The color difference problem in the printing process of self-adhesive labels is a common problem that needs careful control. In order to avoid chromatic aberration, you can start from the following aspects:

First, establish a sound color management system

Formulate color standards: When producing a label product for the first time, the upper limit, standard and lower limit of the color of the label product should be formulated, and it is determined as "proof" after customer confirmation.

Strict implementation of standards: In the future production, the standard color of the sample is based on the strict regulation of the color fluctuation range to ensure the consistency of the product color.

2. Use standard lighting sources

Equipped with standard light source box: Many self-adhesive label printing companies use the lighting source at night and the color difference between the daytime daylight, resulting in printing color differences. Therefore, it is recommended to use a printed standard lighting source and be equipped with a standard light source box for color contrast under a standard light source.

Three, control ink use

Choose regular ink: Ensure that the ink produced by regular manufacturers is used, and pay attention to the shelf life of the ink, avoid the use of expired ink, in order to reduce problems such as ink fading.

Reasonable adjustment of ink concentration: according to the climate environment temperature and the characteristics of printing equipment, adjust the appropriate ink concentration value to reduce the chance of color deviation in printing.

Record the ink ratio: The first preparation of the spot color ink should be recorded by the operator on the process card, in order to provide a data basis for the next preparation of the spot color ink.

Fourth, optimize the printing process

Uniform printing ink layer: Ensure that the printing ink layer is uniform to avoid color problems caused by thick or thin ink layer. Thick ink layer will increase the viscosity, may lead to paper depowder, calender and other problems; A thin layer of ink will make the ink lighter.

Control the printing speed: With the acceleration of the printing speed, the ink temperature gradually increases and the viscosity decreases, which may lead to the ink color becoming lighter and lighter. Therefore, it is necessary to properly adjust the rolling focus of the ink transfer iron rod, gradually increase the amount of ink delivery, and maintain the ink color of the printing before and after.

Avoid ink layering: When distributing intercolor and mixed color inks, ink mixing with a relatively large proportion gap should be avoided as much as possible to prevent printing color bias caused by ink layering.

Fifth, strengthen inspection and random inspection

The first and last part signing system: the inspection items of the color of the label products are added to the first and last part signing system, which is convenient for production management personnel to control the color difference of the label products.

Strengthen inspection and random inspection: Strengthen inspection and random inspection in the production process, and timely discover and deal with label products that exceed the reasonable range of color difference.

6. Pay attention to environmental factors

Control the humidity of the production environment: too high humidity will affect the solubility of the ink, especially the transfer of the shallow network area is difficult to display normally. Therefore, it is necessary to reasonably adjust the humidity of the production workshop.

Seven, improve the quality of operators

Strengthen training: Conduct regular training for operators to improve their understanding of color management and operational skills.

Establish quality awareness: standardize the behavior of workers through the factory management system, improve their quality awareness, ensure excellence in the production process, reduce the occurrence of color difference problems.

To sum up, avoiding the color difference problem in the printing process of self-adhesive labels needs to start from many aspects, including establishing a sound color management system, using standard lighting sources, controlling ink use, optimizing the printing process, strengthening inspection and sampling, paying attention to environmental factors and improving the quality of operators. Through the implementation of these measures, the color difference problem can be effectively controlled and the printing quality of self-adhesive labels can be improved.