Glass differs from all other materials in a number of very important respects:


- glass originates as a transparent and lustrous substance


- any object can be shaped completely free-form from molten glass, without the help of a mould.


This is possible thanks to a further property unique to glass: glass is defined in physics as a dense fluid.


If reheated, glass becomes liquid again. Thanks to this property, a craftsman can complete his work without time limits and without the material deteriorating.


Glass does not develop a patina and is not affected by climatic factors. There are therefore no scientific tests which can determine the age of glass objects. An analysis of their authenticity must consequently be based solely on secondary characteristics an understanding of which is the fruit of experience accumulated by experts over the centuries.


A site on the subject is currently under preparation.


Exhaustive information on our site and in Volume 1 of our Museumís handbook (p.209-232)