what is Quality Control of Adhesive Label Printing? | Pure-easy

When selecting raw materials, it is important to choose high-quality adhesive materials that meet all physical and chemical indicators, rather than expired or unstable products. Although the latter has a lower price, due to the unstable quality of these materials, they consume a lot in various processes, and even cause equipment to be unable to process normally. This wastes not only raw materials but also a lot of manpower and material resources. As a result, the processing cost of finished product labels may not necessarily be low, and more seriously, they may also be returned by customers, or even lose customers.

Printing and processing characteristics of adhesive materials

① The consistency of surface gloss and color, as well as the uniformity of density of the surface material

The achievement of certain indicators determines the uniformity of ink absorption of adhesive materials and also determines the color difference of printed labels in the same batch. The coating strength of the surface material determines whether a large amount of paper powder will be generated during printing and is also an important indicator of printing quality.

② Uniformity and strength indication of base paper and surface material thickness

These indicators are not only related to printing performance, but also important indicators that determine die-cutting uniformity, waste discharge speed, and paper edge breakage. If these indicators are too low, the labeling machine will not be able to produce quickly.

③ The flatness of materials or the uniformity of rewinding tension

Whether it is single sheet printing or roll printing, the flatness of the material determines whether the paper can be correctly fed, run, registered, and delivered during printing. For roll materials, the rewinding tension plays an important role in the flatness of the end face of the roll material, whether there is glue leakage, and whether it can be correctly aligned.

④ Uniformity and correct application amount of adhesive and silicone oil coating

These indicators directly affect the peeling force between the label and the backing paper, and the magnitude of the peeling force directly affects the die-cutting waste removal and machine speed. The peeling force also determines the labeling condition of the label, that is, the application situation. In addition, the amount of glue applied will also affect the glue penetration condition of the material end face. So, when purchasing adhesive materials, it is important to carefully inspect and choose materials with appropriate adhesive and silicon coating amounts.

               

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