How to understand whether it is a truly good copy paper?

Check the appearance of its appearance is smooth, delicate and homogeneous transmittance (i. e. evenness); second check its physical strength performance, indicating that the tearing degree is high, indicating that the transparency of the copy paper is higher, indicating that the higher the quality.

Usually, a good copy paper, taking 17g/m2 copy paper as an example, can usually cover 6-8 layers, which is excellent to 12 layers. So it's called copy paper, actually it's tissue paper.