Electrical tape—often purchased in bulk—is used for wrapping wires and insulating wire ends. Since it directly impacts electrical safety, careful selection is essential.
In terms of appearance, a high-quality roll of electrical tape should have uniform color and a smooth, flat cross-section; there should be no uneven winding or adhesive seepage. Adhesive seepage indicates that the glue has aged; wire ends wrapped with such tape will eventually come loose on their own, potentially leading to serious consequences like electrical leakage. You can unroll a section to test the peel force and the tackiness of the adhesive surface. Ideally, the peel force should be moderate: if it is too light, the tape is difficult to wrap securely around wires; if it is too heavy, it is hard for workers to pull and prone to deformation.
Additionally, the adhesive should be strong, though "stickier" is not necessarily better. Due to the nature of rubber, a rough adhesive surface often indicates poor-quality glue, which tends to disintegrate or become messy when the tape sticks to itself.
