Mortars used in the two-color sgraffito, dating back to 17th century, were investigated to fully characterize the material and to evaluate the state of its preservation. The non-destructive tests carried out comprised thermal imaging and ground penetrating radar. These tests revealed the inner structure and mineralogical composition of the decoration. The results reveal the decoration is composed of two separate coats of lime plasters. The non-destructive studies were performed after conservation and demonstrated that the rehabilitation work had reestablished homogeneous structure of the sgraffito decoration.

What country has developed this test?

1. Peru
2. Poland
3. Korea
4. New Zealand
5. Egypt

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Answer

Poland