Consult the relation between density and hardness of sponge
The density of the sponge is not certain. Depending on the quality of the sponge itself, the density varies. The density of the sponge can be calculated. Steps are as follows:1. Measure sponge quality2. The volume of irregular sponge was measured by sediment discharge method3. The density of the sponge is obtained by the formula quality / density
Sponge is a porous material that has good water absorption and can be used for cleaning objects. Sponges commonly used are made of wood cellulose fibers or foam plastic polymers. In addition, there are natural sponges made of sponges. Most natural sponges are used for body cleaning or painting. In addition, there are three kinds of synthetic sponge made of other materials, such as low density polyether (non absorbent sponge), polyvinyl alcohol (high water absorbent material, no obvious pores) and polyester.
Sponge density is directly proportional to hardness, the greater the density, the greater the hardness.
