No-one likes general adverts, and ours hadn't been updated for ages, so we're having a clear-out and a change round to make the new ones useful to you. These new adverts bring in a small amount to help pay for the board and keep it free for you to use, so please do use them whenever you can, Let our links help you find great books on glass or a new piece for your collection. Thank you for supporting the Board.

Author Topic: Salviati Uranium Glass Plates  (Read 1464 times)

0 Members and 1 Guest are viewing this topic.

Offline NevB

  • Members
  • **
  • Posts: 1835
  • Gender: Male
    • uranium glass
    • England
Salviati Uranium Glass Plates
« on: October 02, 2020, 09:16:55 AM »
These are three 16cm. plates which I think are made by Salviati. They have a gold aventurine swirl pattern on the backs and rough pontils. They glow really well under UV and having tested them with a Geiger counter they are considerably more radioactive than my other glass, so they will be kept in a glass cabinet!
"I hear you're a racist now father!" Father Ted.

Offline chopin-liszt

  • Members
  • **
  • Posts: 14451
    • Scotland, Europe.
Re: Salviati Uranium Glass Plates
« Reply #1 on: October 02, 2020, 12:37:01 PM »
 ;D A Geiger counter only detects about 10% of what is really happening, but Uranium activity doesn't get very far, can be stopped with a sheet of paper (lead aprons are not required) and is a low level sort of energy - not particularly harmful and the uranium itself stays in the glass.
It's only dangerous if bits of it get inside you - dust from it being etched or polished or from breaking, getting breathed in.
Cheers, Sue M. (she/her)

‘For every problem there is a solution: neat, plausible and wrong’. H.L.Mencken

Offline NevB

  • Members
  • **
  • Posts: 1835
  • Gender: Male
    • uranium glass
    • England
Re: Salviati Uranium Glass Plates
« Reply #2 on: October 02, 2020, 05:50:15 PM »
You're right Sue as I have to put the Geiger counter on the plates to get a reading. However it's a bit disconcerting at first when most of my uranium glass gives a reading of of around 30cpm (counts per minute) and the plates give between 320 and 350cpm  :o, but like you say it's still safe  ;D.
"I hear you're a racist now father!" Father Ted.

Offline chopin-liszt

  • Members
  • **
  • Posts: 14451
    • Scotland, Europe.
Re: Salviati Uranium Glass Plates
« Reply #3 on: October 02, 2020, 06:03:31 PM »
 ;D I used to play with it in labs, and there's absolutely nothing wrong with me...  ::)
Cheers, Sue M. (she/her)

‘For every problem there is a solution: neat, plausible and wrong’. H.L.Mencken

Offline NevB

  • Members
  • **
  • Posts: 1835
  • Gender: Male
    • uranium glass
    • England
Re: Salviati Uranium Glass Plates
« Reply #4 on: October 02, 2020, 06:08:06 PM »
Gimme six on that  ;D
"I hear you're a racist now father!" Father Ted.

Offline glassobsessed

  • Members
  • **
  • Posts: 6665
  • Gender: Male
    • Mdina
    • South Wales
Re: Salviati Uranium Glass Plates
« Reply #5 on: October 06, 2020, 07:09:42 AM »
They are made with gold leaf, the 'stripes' are where two sheets have overlapped. Aventurine is copper particles held in suspension within the glass (is that the right terminology Sue?) . To my ear gold and aventurine do not belong within the same expression. A further complication is when gold powder is used instead (often by Seguso) but all three techniques look quite different if you pay attention to the detail.

John

Offline NevB

  • Members
  • **
  • Posts: 1835
  • Gender: Male
    • uranium glass
    • England
Re: Salviati Uranium Glass Plates
« Reply #6 on: October 06, 2020, 08:02:07 AM »
You are right John, the gold swirls are made with a high carat gold, I should have said perhaps "aventurine effect".
"I hear you're a racist now father!" Father Ted.

Offline chopin-liszt

  • Members
  • **
  • Posts: 14451
    • Scotland, Europe.
Re: Salviati Uranium Glass Plates
« Reply #7 on: October 06, 2020, 01:43:02 PM »
Aventurine is copper powder or tiny tiny particles of copper, suspended in glass, yes. :)
But it can come in other colours, rather than copper metal.
Green aventurine involves chromuim as far as I know. It turned up on some Monart by accident when a chromuim "scum" developed on the pot.
Sometimes copper aventurine can look green, if clear green enamel is over them.

But these plates contain gold foil. Nothing to do with aventurine at all. :)
Cheers, Sue M. (she/her)

‘For every problem there is a solution: neat, plausible and wrong’. H.L.Mencken

 

SMF spam blocked by CleanTalk
Visit the Glass Encyclopedia
link to glass encyclopedia
Visit the Online Glass Museum
link to glass museum


This website is provided by Angela Bowey, PO Box 113, Paihia 0247, New Zealand