1, smell it. The cellophane used for box sealing has a strong smell and sour taste, which shows that the cellophane has poor retention, especially in low temperature environment, and the cellophane stuck to the carton may crack. The smell is very strong. Although this kind of transparent tape feels good, the adhesive surface will soon dry and lose its adhesiveness, resulting in cracks on the surface of the transparent tape.

2. Thickness of the handle film. The quality of scotch tape with hard film is generally not good. Due to the film thickness, the actual number of meters will decrease. The film used in good scotch tape is soft and has good stretchability.

3. Look at the color. Usually, the whiter the transparent tape, the purer the texture, the less impurities and the better the adhesion. See if there are any irregular white spots on the surface of scotch tape. What can't be erased by hand pressure is the mark of impurities or glue. Such scotch tape generally smells.

4. Measure the tightness. Generally, normal scotch tape is thicker, because it is loosely wound, which creates the illusion that it is thicker and more cost-effective. In this case, it is inaccurate and unscientific to measure the thickness with a ruler. Very compact can reduce the possibility of glue overflow and save space.

Ming 'an packaging!