⑴ Comprehensive considerations such as the type, grade, quality, quality, adhesive surface characteristics, and user requirements of the label object. If you want to use a tag made of well -transparent polypropylene non -drying labels to the transparent bottle, it can produce a fashionless feeling without labels, which can improve the grade of goods and stimulate consumers' desire to buy. The flexibility, contraction, obsession, processing characteristics and labeling characteristics of polyvinyl chloride film are very good, and the colors are bright, and they have the functions of promoting promotional products.
The surface of the thin -film non -drying label must be smooth and dense, uniform density, consistent in color, and good light transmittability to ensure that the film is uniform and the color difference of the same batch of printed products is small.
(3) The thickness of non -gum labels should be uniform, and the strength index must be qualified. The printing pressure applied during the printing process is related to the thickness of non -drying gum. If the thickness is uneven, the printing pressure is also uneven, which will cause the handwriting or ink color of the label printing to be deep and shallow. If the strength of the film is too poor, the tension of the film during printing is difficult to control, which will have a great impact on mold cutting and waste.
The label of non -drying gum should be flattened, and the tension of the reunion should be uniform. If the flatness is good, it can be properly transported, run, set, and collect the volume when printing. The compound tension of the film should be uniform and appropriate. For example, the tension is too small, the film substrate is relaxed, and the vertical and horizontal printing is not accurate.
The label of ⑸ ⑸ ⑸ also must be resistant to corrosion, aging resistance, non -degenerate, and small contraction and expansion ratio. If the corrosion resistance is poor, the aging and degeneration are not durable, and it will also affect the sales and use of the product. If the contraction and expansion ratio is large, it will not only affect the accuracy during printing, but also deform the label during use, which will affect the sales and use of goods. In particular, the labels of high -end products should be avoided as much as possible, and the embarrassing situation of aging labels (the label aging includes plastic aging and ink refunds and other reasons). If necessary, deal with plastic or labels for aging experiments to detect its use performance.
标 The non -drying label for purchasing must also maintain good stickiness during the validity period.
