How to identify the quality of colored tape
Colored adhesive tapes are for marking and masking purposes. Generally, there are more beige and khaki. Many people think that the colored tape is the color of the film, but the color is actually the color of the glue. Pinch the adhesive tightly and then quickly pull it apart, you can pull off the glue on one side, and you can see the purity and transparency of the original film. It is important to see the thickness of the glue. If there is no glue to be pulled apart or dotted, there are a lot of impurities in the glue, and the glue has no cohesion. The second is that there is too much water and has volatilized. At this time, the initial adhesion of this tape has dropped significantly, and the hand feel can be distinguished. Cover the object with yellow tape, the better the masking, the thicker the glue and the better the quality.
Another important condition for distinguishing good and bad tapes is not to feel the viscosity alone, because the initial adhesion of the doped tape is very high when it does not volatilize, so stick the object with tape and quickly pull it away to see the holding force. After pasting it several times and then touching it with your hands, you will obviously feel that the stickiness has decreased. Doped tapes are usually dissolved with gasoline and acid when making glue formulations, so the smell is very strong. Regular large companies use toluene to dissolve them, and they have been volatilized by fans during the coating process.
Having said so much, you may ask, is there any difference between good and bad tapes in use? In fact, the purpose of our use of tape is not to stick to the problem, but to stick firmly and not separate. Now most of the tapes with impurities will break apart after a period of packaging operation (between 20 minutes and 1 hour), and they cannot be pasted again, especially in low temperature environments and windy dry conditions The next is more obvious. Again, inferior tapes are easy to break and have very low strength, which is mainly related to the quality of the film.