Our experience is that hard paste porcelain always looks the same under UV
shortwave light, wherever it was made.

Barbara H. Magid
Alexandria Archaeology Museum
105 N. Union Street #327
Alexandria, VA 22314
(703)838-4399
(703)838-6491 (fax)
www.AlexandriaArchaeology.org



                                                                           
             Susan Walter                                                  
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             08/31/2005 11:22                                              
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THANK YOU!
----- Original Message -----
From: "George Myers" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, August 31, 2005 5:50 AM
Subject: Re: porcelain id


One thing you might give a try, is to illuminate the pieces under long
and/or shortwave ultraviolet light. Certain types of artifacts, though
characterized as the same type (lead glass) will glow or fluoresce at
a different wavelength due to their different chemical compositions,
methods of manufacture, changing formula, etc., perhaps, and maybe
(like CSI and their filter glasses) show a fundamental difference
between the two.

George Myers

(lead glass generally fluoresces vs. regular glass)