How to distinguish between white and bleaching of webbing?

How to distinguish between white and bleaching

The original white, as the name implies, is the inherent white color of the material itself.

Bleaching makes it whiter by chemical means, like paper and snow. However, the difference between the white and bleaching of some materials is very small, such as nylon. If you don't put the two colors together for comparison, you can't make it clear. 

Here's how to see it:

At first glance, the color of the bleached ribbon is snow-white, like the color of printing paper, and the color of the original white is slightly yellow.

Look at the texture. The bleached webbing is more delicate and smooth, while the original white is rougher. Touching it by hand is two different feelings.