What is Acid Resistance?

Defines the quantity of weight loss of a natural stone when exposed to an acidic solution for a defined timespan and at a defined temperature. The result is expressed in mg cm-2.

What is Alkali Resistance?

Similar to the Acid Resistance, the Alkali Resistance of a material describes the weight loss a natural stone suffered when exposed to an alkali solution for a defined timespan and at a defined temperature. The result is expressed in mg cm-2.

What is Water Absorption?

As natural stone is not a homogeneous material, it absorbs liquids. Water Absorption is measured by submerging a natural stone in water at a defined temperature and for a defined time span. After this process, the increase in weight is quantified and expressed in percent (%).

What is Freeze-Thaw-Resistance?

Freeze-Thaw-Resistance measures the weight loss a natural stone suffers when being exposed to a defined number of freezing and thawing. Before the test, the material is submerged in water for a defined timespan. The repeated freezing and thawing will cause the absorbed water to expand and contract repeatedly. The results are measured in percent (%) of weight loss.