Polish Stone Value
Polish Stone Value is the name of a product's hardness.
Dansk Kvarts Industri A/S is using a recognised and approved laboratory in England for these tests.
The test is carried out by sending 5 kg of the specific product in the size 8-16 mm.
This sample is crushed and thus the value of hardness can be identified.
This way you can compare the hardness of the different products.
Dana Kvarts Industri A/S