I disagree completely about Christine's weight needing a mould.
My early RCA and Glasshouse pieces have (much bigger) bubbles with exactly the same sort of colour formations around them as the small bubbles in Christine's weight. It is the presence of the salts and their chemical interactions with the metal which CAUSE the bubbles to form - with the ambers around the bubble grading into yellows. At the edge of the yellowy bits, the glass is clear and blue - there is no evidence of any migration towards the bubble, which would leave yellow trails.
The colour comes from the silver metal ions. Chlorine is a gas. The heat of the molten glass dissociates the two chemicals. So gas for a bubble needen't even come from dissolved gas in the metal - the chlorine may well be it's source.
How were you thinking salts might might achieve a migration towards a bubble, Patrick?
It doesn't make any sort of chemical or physical sense (not to me anyway!)
But I do need to find out how exactly, the salts were introduced. I don't know if they were, for example, suspended in an oil, or dissolved in an oil, or simply used as crystals, or ground crystals.....
It's quite nasty stuff, going by how it would be used in a lab, it would be more likely to be in a carrier than used "raw" - I think that is something folk would try to avoid.
With regard to my cocktail jugs, while they are a very similar shape to some jugs produced at wfs, this was a style which was becoming very common and popular around the late '60s- '70s - folk started travelling around Europe on holidays a lot more, and sangria became fashionable.
Jugs with lips around the spout to hold back ice and bits also became popular. I really don't think they're an "exclusively wfs" shape!!!!!!!!
Re. the beaked Mdina pieces, there is mine, which is of the correct period to be Boffo.
There are two known others which have been seen - one in a much more "jewel-like" blue with no marks or labels, and with pulled-up bits (seen by suzygpr, I have a photo) - the other was seen by Mark Hill, in Prague, with a plastic label.
The colour of the one seen by Suzy, and the plastic label on the one Mark's seen, both indicate far more recent production - probably '90s onwards. We can forget about them.
The slim, wide flanges on the tops of things were a Boffo trait. Before they introduced these, the (now highly desirable) button rims were used.
Topic: Help needed please from a Mdina collector...... (Read 13120 times)
