Just a reminder note:-
in The Examiner in 1837, which reported on the china and glass supplied for the Queen Victoria banquet and being supplied by Davenports, the point of this thread was some finger bowls and hock glasses were mentioned in the report.
To re-iterate, they were reported in the Examiner as being 'topaz-coloured' hock glasses and 'topaz-coloured' finger glasses:
https://www.google.co.uk/books/edition/The_Examiner/zWiNg5Znyt4C?hl=en&gbpv=1&dq=guildhall+topaz+glass&pg=PA729&printsec=frontcoverThey were not reported as being 'gold-topaz' or uranium glass.
The V&A have a yellow Queen Victoria uranium glass bowl and say it was produced by Davenports.
I may have already noted this on this thread and completely forgotten about it:
Spiegl W. in Farbige Gläser has a description of what Topas-glas was:
Source -
http://www.glas-forschung.info/pageone/pdf/farbglas.pdfpage 30. Chapter heading 'Rosa Rubin und Topas-glas'
He begins the chapter with a long description of gold ruby glass.
BTW - Spiegl notes specifically that the Harrach pink glass was lead free. I'm not sure whether other of their glass was lead glass or if I'm completely mistaken on that point (I recall mentioning somewhere that they used lead glass):
'...The Harrach "pink glass", a pound of which cost 2 guilders 40 kreuzers to produce and was thus only slightly more expensive than the "special blue for overlay", as well as the "pink ruby according to M. E. Schmid"[6], were lead-free chalk glasses with gold dissolution. For a while...'
Then in the next paragraph goes on to say (google translated)
'Related to the gold ruby is the "topaz glass," which could be produced in Neuwelt as early as 1829 and by Lötz and Schmidt in the Goldbrunn glassworks from around 1830. In addition to the gold dissolution, a small amount of antimony oxide was added to the melt, which gave the glass a reddish-yellow color.'
'Mit dem Goldrubin verwandt ist das »Topasglas«, das man in Neuwelt schon 1829
herstellen konnte und bei Lötz und Schmidt in der Goldbrunnhütte etwa seit 1830.
Neben der Goldauflösung wurde der Schmelze eine kleine Menge Antimonoxid
beigegeben, das dem Glas eine rötlich gelbe Färbung verleiht.'
Sooooo, when contemporary reports talk of 'gold-topaz' glass, is it referring not to the colour gold but to the inclusion of gold in the melt in order to make the colour topaz?
He described topaz-glas as being a reddish yellow colour. The Queen Victoria bowls are transparent yellow uranium glass colour not at all a reddish yellow colour.
In Reply #23 on this thread I noted:
Quote
'
As I posted earlier in this thread, Apsley Pellatt mentions in his book of 1849:
'Then he goes on to say the chameleon-like effect of it is 'also produced by uranium alone, used as the colouring oxide for gold topaz: it has been much in demand for hock glasses and decanters, and many ornamental articles of glass;...' (hock- my bold, German white wine)''
Spiegl doesn't give uranium as a constituent of Topas-glas.
Pellatt gives uranium as the colouring oxide for gold topaz.
So then, is 'gold topaz' actually Spiegl's Topas-glas but with the addition of uranium? Or ... is the 'gold' in the phrase 'gold topaz' referring to the use of gold in the batch to create Topas-glas.
i.e. Has there been some confusion? Or does Pellatt mean something else entirely when he calls it 'gold topaz'.
Topic: Info on James Powell Topaz glass - "The Queen Victoria Topaz bowl" (Read 33202 times)
