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Design of material and technological copy for repair of sgraffito decorated renders
Válek, Jan ; Skružná, Olga ; Wichterlová, Z. ; Waisserová, J.
This paper deals with research in Renaissance sgraffito materials and techniques. It focuses on the replication process for original materials and application techniques used in a reconstruction of the missing parts of a sgraffito decoration depicting a Landsknecht procession on the façade of a house in Slavonice. The result of the theoretical and practical experimental work is the description and evaluation of the process of creating a material and technological copy of the original. This involved detailed material analysis, determining the provenance of and selecting suitable raw materials, design of a repair mix and its testing, and evaluation during application trials. The study has shown that, in order to achieve good results, the conclusions of material analysis have to be linked to the practical\nskills of restorers and conservators. The particular application procedures that match the requirements of the historical material and the original work can be deduced from full scale practical trials. Feedback between the design of the repair mixture and the application process made it possible to come to an optimal material and application technique. The missing parts of the sgraffito were replaced using a mortar and application technique that closely correspond to those originally used in the Renaissance.
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Průzkum vnějšího pláště márnice v Ostrovci u Velečína. Výzkumná zpráva k projektu MK NAKI DF11P01OVV008
Slížková, Zuzana ; Frankeová, Dita ; Petráňová, Veronika ; Zeman, Antonín ; Hauková, Petra ; Mácová, Petra ; Niedoba, Krzysztof ; Viani, Alberto ; Pérez-Estébanez, Marta ; Zíma, Pavel ; Janotová, Dana
Zpráva prezentuje výsledky průzkumu márnice v Ostrovci u Velečína. Tento objekt byl vybrán pro aplikování vzorků omítek vyvíjených v projektu MK NAKI DF11P01OVV008. Průzkum je zaměřen na soklovou část márnice, kde omítka opakovaně promrzá a po jedné zimě odpadává. Příčiny poruchy a materiálové složení byly zkoumány následujícími technikami: x-ray diffraction (XRD), thermal analysis (TG), optic and electron microscopy, FTIR and Raman spectroscopy.
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