Fluorescence

On microscopic examination of cross-sections sampled from aged,
japanned surfaces on furniture, a bright and saturated red
fluorescence colour has been observed. The light was in the lower
UV-range, 330-390nm. At a higher UV-range 430-450nm the fluorescence
was not visible. The red colour (like good quality wine) has been
interpreted as silver. I would appreciate any comment from anyone
with experience of metal/silver fluorescence, either from metal
foil or powder incorporated in lacquer media.

Maria Brunskog


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                  Conservation DistList Instance 14:64
                  Distributed: Thursday, May 24, 2001
                       Message Id: cdl-14-64-010
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