Clarification, please. I am getting the impression that it is believed that temperature sensitive glass has to contain either uranium or gold. This just isn't the case. Hajdamach recognised in his book that Walsh
Crushed Strawberry, launched in November 1883, was temperature-sensitive glass. We now know that the formula for
Crushed Strawberry contains neither uranium nor gold. The faint response you get to UV in examples of Walsh
Crushed Strawberry is from the inner layer of pale apple green that Walsh used. We also know that within a few years the formula for
Crushed Strawberry was known in the United States, and, as it was most likely being spread by consultative raw material representatives, we can assume that it became general knowledge worldwide quite quickly.
We don't know whether Walsh made a shaded version of
Crushed Strawberry like
Peach-blow and
Burmese, but I would be surprised if they hadn't experimented with it. Possibly patents prevented them from going into production here. Lining up my four quite variable examples of Walsh
Crushed Strawberry with my mystery decorated ewer shows no substantial difference in surface colour, except that the ewer is shaded.
None of this helps to attribute these decorated pieces, except that a Bohemian glass house seems more and more likely.
Bernard C.
