The difference between pvc and light-absorbing cloth

What's the difference between pvc and absorbent cloth? The difference between pvc and light-absorbing cloth lies in:

1, pvc coated cloth, is a kind of canvas cloth blank, coated with glue containing pvc, which makes its surface smoother and waterproof as 100%, but it has no light absorption function.

2, the light-absorbing cloth does not reflect light, can absorb excess light, and keep the background pure. Used in the studio.