The importance of degree of absorption
In many cases the detergents are responsible for the loss of shine and some deterioration in the surface of the stones. This is the result of formation of salts inside the small pores which are in the stones.
The abundance of chemical compounds which permit that every detergent cleans more or cleans better, is responsible for dirtying from inside the pores of the stones with salts that when dissolved in water, enter easily but remain there when the water evaporates, because the salts do not evaporate.

“This is not Chopin who needs us, we are the ones that need to warm up with the splendor of his fame and genius” – said Hanna Gronkiewicz-Waltz, capital’s president, during the official opening of the Fryderyk Chopin Museum in Warsaw. The building that honors the memory of the great composer is situated in the seventeenth-century Ostrogski Castle at Tamka Street. The works lasted several years.