The adhesive sticker label printing have higher requirements on process and printing equipment, so when choosing the adhesive sticker should pay attention to the following points:
1. According to the labeling of the object type, the scale, quality, characteristics on the surface of the paste, the using environment and the user's requirements and other comprehensive consideration. If you want to use good transparency polypropylene adhesive printing labels on the label made of transparent bottles can produce no labels of fashionable feeling, can enhance the grade of the goods, stimulate consumer purchasing desire. And polyvinyl chloride (PVC) film flexibility, contractility, opaque, processing property and labeling features are very good, and colourful, have the function of the promotion of goods.
2. Film class the adhesive sticker surface must be smooth and uniform compact, density, colour and lustre is consistent, pervious to light and to ensure the film absorbing ink evenly, with the printing quality of color difference is small.
3. The thickness of the adhesive sticker wants uniformity, intensity index to be qualified. Printing process of printing pressure associated with adhesive thickness, if the thickness, the printing pressure is uneven, lead to label print handwriting or ink has deep have shallow. If poor strength of thin film, printing film tension, it is difficult to control in the process of the die cutting and produce a great impact on the waste discharge.
4. The adhesive sticker to level off some, rewinding tension is uniform. Good flatness, printing to the correct delivery, running, alignment, and winding. The rewinding tension of the film is uniform properly, such as tension is too small, thin film base material is flabby, lateral misregister; Tension is too large, such as base material transverse shrinkage, color is not stable, also hard to normal printing.
5. Film class the self adhesive stickers also has corrosion resistance, ageing resistance, do not fade, the characteristics of shrinkage, low expansion ratio. Such as poor corrosion resistance, easy aging and fading, the label is not made of durable, will also affect the product sales and use. If the contraction and expansion ratio is larger, the not only influence the printing overprint precision, also can make the label deformation in use process, affect product sales and use. Especially high-grade goods, should try to avoid the goods being expired, and tag has the embarrassing situation of aging (including plastic tag aging and fading of ink). Necessary to carry on the resistance to aging experiment to deal with plastic or label, testing its performance.
6. The choose and buy the adhesive sticker is in the period of validity, maintain good viscosity.