Sponge density of compressed wood pulp and cotton products

How is the sponge density of compressed wood pulp cotton products defined?
Commonly used sponges are divided into three types: high-density sponge, medium-density sponge, and low-density sponge according to their structure. According to the interpretation of the national customs department, the density ≥ 45 is high density, the density between 45 and 18 is medium density, and the density < 18 is low density.
Generally speaking, high-density wood pulp cotton has high hardness, but it is not excluded that some high-density sponges will be added with super-soft additives to make the sponge super-soft. The softness and hardness of sponges of the same density are also different. Medium and low density sponges are used as general protective materials. High-density sponge is often used to make sound-absorbing cotton, sofa cushions, soft bags and other materials.

The magic wipe sponge is also a high-density nano-sponge, which is denser than ordinary sponges. There is no need to add any detergent to use it. If anything in the house is dirty, use it for a few rubs and it will be clean as new immediately.
The magic wiping sponge rubs the foaming pores evenly and smoothly, and each small particle is smaller than one ten thousandth of the hair. The magic power of wiping off the dirt, the capillary phenomenon can automatically absorb the dirt on the surface of the object to remove the dirt.
Such a small sponge will not hurt your hands or add detergent. You only need to dip a little water and wipe it a few times and it will become very clean!