For colored tapes, it is for marking and masking purposes, generally beige and khaki are more common. 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 glue 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 no glue is pulled apart or pulled apart in dots, there is a large amount of impurities in the glue, and the glue has no cohesion. The second is that there is too much water and it has evaporated. At this time, the initial adhesion of the tape has dropped very much, and the feel can be distinguished. Apply the yellow tape to the object, the better the masking, the thicker the glue and the better the quality.
Another important condition for distinguishing good or bad tape is not to feel the viscosity by hand, because the initial adhesion of the doped tape is very high when it is not volatilized, so use tape to stick the object and then quickly pull it away to see the holding force. Repeatedly pasted several times and then touched with hands, the feeling of flexibility decreased obviously. The doped tape is usually dissolved with gasoline and acid when it is used for glue formulation, so the smell is very strong. Regular large enterprises use toluene to dissolve it, and it has been volatilized by the fan 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 using tape is not to stick to the problem, but to stick it firmly and not to separate. Most of today's doped tapes will collapse after a period of time (between 20 minutes and 1 hour) and cannot be reapplied, especially in cooler and windy dry conditions more obvious below. Again, inferior tapes are easy to break and have low strength, which is mainly related to the quality of the film.
