Čištění sádrové plastiky
The plaster bust of Karolína Světlá by the sculptor Augustine Zoula from the collections of the City of Prague Museum was dirtied by dust and other atmospheric pollutants. The bust was also stained, cracked and bore traces of other mechanical damage. The article deals with selecting an appropriate method for the deep cleansing of an untreated surface of plaster casts. A survey was carried out to test the cleaning effects of starch and gelatine coatings on plaster samples. The selected procedure of deep cleansing was applied to the described model. The plaster surface was then hardened and the missing material was replaced. The bust surface was finally conserved by a layer of shellac.