Preliminary Study of the Targeted Cleaning of an Artificial Gypsum Layer on White Marble

Targeting cleaning of the artificial gypsum layer on white marble was studied. It conducted by means specific depletion calcium and sulfate ions barium carbonate scavenger, which led to continuous dissolution clearance layer. The effect evaluated scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), diffraction (XRD), capillary suction, color difference measurement. By this method, only cleared away substrate left intact at same time. This method will be highly useful for conservation relics from surface weathering.