When the tape manufacturer selects the electrical tape, the color should be uniform, the section should be flat, there is no convex roll, and there is no glue overflow.

If the glue overflows, it means that the glue of the tape has aged. The thread wrapped with this tape will loosen itself in a short time, resulting in serious consequences of electric leakage, so it must not be used. You can open the tape and feel the peeling force of the tape and the viscosity of the adhesive surface by hand. Generally, the peeling force of the tape is moderate. If it is too light, it is not good to wind the wire, if it is too heavy, it is difficult to open, and it is easy to pull and deform the tape. It is also required that the adhesive surface be more viscous, but the more sticky it is, the better.

In addition, we can double the length of the tape and see the anti whiteness of the tape. If the color of the tape does not change or only changes a little, it proves that the substrate of the tape has not added or only added a little filler, and the quality is very correct.