Conservation * Examination, Condition Issues, Treatment
UV LIGHT

An invisible form of small wavelength radiation that may be absorbed by a material and then radiated back as visible light. The visible radiation, such as a colored fluorescence, may be so characteristic as to identify the presence of a particular substance, such as the pigment Indian yellow. Or, a difference in radiation from seemingly identical contiguous areas in an object may indicate that an adhesive is present or some chemical treatment was undertaken in one of the areas that was not otherwise readily discernible in normal light.
 
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UBL Conservation Lab

 

 

AUTHORS: PAUL HEPWORTH AND KARIN SCHEPER