2. Cellophane is a film-like product made of recycled fibers. One or both sides of ordinary cellophane are coated with moisture-proof coating, and then dried and humidified to make moisture-proof cellophane.
3. With the change of cellophane tension, the elongation of the film increases with the increase of tension in the printing process, which brings difficulties to the accuracy of color printing overprint. Adjust the tension according to the type of substrate material and its expansion rate, for example, the expansion rate of pe film is relatively large and the tension value is relatively small; For paper or plastic film with small expansion rate such as PET and OPP, the tension can be appropriately larger. Smooth surface, no pores, ink layer is not easy to fix or not fixed firmly. After the printing of the first color is completed, it is easy to be stuck by the overlapping ink of the next color, which makes the pattern and text incomplete and causes defects.
4. It can prevent rust, moisture and pollution after packaging articles. But cellophane also has some shortcomings: high longitudinal strength, low transverse strength, poor tearing degree, slight cracks, and it will break when torn. Cellophane is also hydrophilic, so it can absorb water, often sticks when it meets water, and easily sticks between pages when it meets heat. Cellophane is characterized by high transparency and strong gloss, and the color after printing is particularly bright, which is beyond the reach of plastic film; Good printability, no need for any treatment before printing, cellophane also has antistatic property, and it is not easy to absorb dust, thus avoiding printing faults such as graphic dust sticking. However, the film is easy to deform due to the influence of temperature and humidity, which makes it difficult to register pictures and texts when printing.