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What is the purpose of checking the appearance quality of the self-adhesive label before printing? This is to better avoid printing failure caused by its own product quality problems. In other words, if there is a problem with the material itself, various problems often occur throughout the printing process. Therefore, prepress product quality work must be done well. Whether it is the problem of the material itself or the damage of the material during the entire transportation process, it must be disposed of before printing, so which types should be specifically checked?
Self-adhesive labels, also known as self-adhesive labels, are 1 composite materials that use paper, film or other special materials as fabrics, with adhesive on the back, and silicon-coated protective paper as the base paper. After printing, die cutting, etc., it becomes a finished label. The following is a detailed introduction of self-adhesive label printing and plate making, take a look at it! Label printing typically uses two types of paper. The 1 is the structure of paper monomer and adhesive coating, and the adhesive coating mainly includes active glue. The other is that the paper is the surface matrix, coated with pressure sensitive adhesive. For two different sheets, there are two different printing methods.
When using offset printing machine to print PVC self-adhesive materials, small ink adhesion and dirty back of PVC self-adhesive materials have always been difficult problems for printing manufacturers. The main reason for this problem is due to the poor absorption of PVC to ink. It is very difficult to dry completely by ink volatilization, especially when printing large areas, the drying time will exceed 48 hours, and the adhesion of the ink is very small, and the 1 is wiped off. Since there are few special inks for printing PVC materials, ordinary inks have to be used to print PVC adhesive materials. In fact, there is a way to easily solve this problem. Interested colleagues may as well try it 1. Solution: Use bright and quick-drying ink, add 3% red dry oil and 5% Central Asia brand ink god, and use varnish instead of clear oil to mix until it is suitable for printing. The addition of ink god has a significant effect on preventing the back from fouling. The increase of varnish improves the drying speed of ink and the adhesion of ink. A batch of bottled water trademarks printed by customer manufacturers with this method are of good quality and have been well received by customers.
Self-adhesive labels are the 1 type of printed self-adhesive labels that must be used in many barcode printing devices. This type of label mainly consists of base paper and face paper glued together. This label can better avoid scratches and lightened tones on the barcode. The general tone of self-adhesive labels is mainly blue and white, which is a relatively common type. It has many types of materials. Below, let us briefly introduce the common types of self-adhesive labels.
When we buy food, most people will pay attention to the shelf life of the food, the price, etc. The concept of food labels can only stay on the "bar code" scanned by the supermarket checkout payment. In fact, food labels are not just "bar codes". The outer packaging of the food is printed with various words or graphics that constitute the food label.
1. Emphasize the meaning of the label surface Because labels treated with self-adhesive materials may be marked on the surface of various materials (such as glass, metal, cardboard and plastic). Plastics can be divided into: polyvinyl chloride, high density polyethylene. Tests have shown that different label surfaces have the greatest impact on performance.