Some years ago Ivo mentioned a way to distinguish between production on Murano before and after a rough date of around about 1960. Due to a redesign of furnaces/chimneys around this time ash was mostly eliminated from falling back into the pot and as a result the tiny black specks of ash found in older examples were eliminated. As with all rules of thumb no doubt there will be some exceptions.
I can find you many, many 17th and 19th century examples of Venetian glass with no "black specs". "Black specs" is just another red herring to dating.
Whilst it may be true due to changes in furnaces etc. that post 1960 Venetian glass will not have "black specs", it is totally misleading to say pre 1960 will have or even likely to have "black specs"
Topic: Salviati Opal Glass but how old ? (Read 1296 times)
