Glass Discussion & Research. NO IDENTIFICATION REQUESTS here please. > Malta Glass
Show and tell - Mdina Tricorn bottle
glassobsessed:
All three tricorns here have that 'feature'. The open end would need to be sealed for cooling air to be the cause. I suspect the glass would cool more rapidly in contact with the marver than the air inside, for what it is worth.
chopin-liszt:
Another of these split second timing things, where I have not a clue what the maker is actually doing. ;D
But not something I'd thought of before. The "hollow" in the walls does seem to be an earlier feature, and probably is, as you point out, more to do with the outside of the metal cooling and contracting, than the air inside. :)
glassobsessed:
Pretty sure I have seen glass blowers stick a thumb over the end of the blowing iron to seal it temporarily. What happens when a round shape is flattened? Presumably the 'centre' is flattened before the outer edges (however short a time scale), not a clue really just thinking out loud.
As requested, the photos of your Tricorn.
chopin-liszt:
Wonderful, thank-you! This is my "new" one, which John didn't need any more and let me have it. ;D
The tall u-shaped loop of silver salt ochre, which I think is the secod addition of salts, is at the bottom of the third image. 8)
Now you mention it, yes, I've seen makers seal the end of the blowing iron with their thumb, when they take their mouth off it.
I'll have to have a think too.
The round shape would not neccessarily be held by molten metal and so wouldn't "bounce" inwards, I'd have thought. Maybe it's more to do with contraction on the outside because of temperature.
suzygpr:
Love your new bell vase John, had my eye on it too :) Glad it went to a good home. xxx
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