How many grades does the hardness of glue line divide?
The hardness of PVC materials is generally 0-99sa shore hardness tester.
60P is a formula used by Taiwan companies and Hong Kong companies.This method is unscientific.
Because the hardness of 60P of each rubber company is different, some differences of the same P number are more than 5SA.
60P is about 80SA.
The smaller the P value, the harder the hardness. On the contrary, the higher the P value is, the softer the hardness will be.