Evaluation of the efficiency of nanomagnetic in cleaning mural paintings surfaces

Document Type : Academic scientific reviews of any other material related to the main domains of this Journal.

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Department of conservation, faculty of archaeology Aswan university

Abstract

Mural paintings need to choose the appropriate cleaning and treatment method and style, and each mural has its own case in the way it is dealt with. The research aims to evaluate the efficiency of the nanomagnetic material to clean the surfaces of mural paintings, so the study used many examination and analysis devices. The scanning electron microscope equipped with an elemental analysis unit (SEM-EDX) and a high-resolution optical microscope were used to examine samples under normal light and ultraviolet (PLM under normal light and UV) and a transmission electron microscope (TEM), in order to study the internal structure of the nanomagnetic material. Raman spectroscopy was also used to identify the red and yellow pigments, and the extent to which they were affected by cleaning with the nanomagnetic material before and after cleaning. In addition, the Colorimetric change was studied in order to evaluate the total colorimetric change of the standard sample before and after cleaning with the nanomagnetic material. This was done through a standard sample that was measured for the red and yellow pigments before cleaning and measured again after the cleaning process to observe the colorimetric change before and after cleaning. The study concluded that there was a change in the pigments values of the red hematite pigment without a change in the chemical composition, and no change occurred in the color values or chemical composition of the yellow goethite pigment.

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