What's water absorption?

As natural stone isn't a homogeneous fabric, it absorbs beverages. Water absorption is measured by way of submerging a herbal stone in water at a defined temperature and for a described time span. After this procedure, the increase in weight is quantified and expressed in percent (%).

What is freeze-thaw-resistance?

Freeze-thaw-resistance measures the weight reduction a herbal stone suffers whilst being uncovered to a defined number of freezing and thawing. Before the test, the fabric is submerged in water for a defined timespan. The repeated freezing and thawing will motive the absorbed water to amplify and settlement time and again. The results are measured in percent (%) of weight reduction.