Author Topic: some of my newest additions to my family of Monart  (Read 241 times)

0 Members and 1 Guest are viewing this topic.

Offline Lustrousstone

  • Members
  • **
  • Posts: 11973
  • Gender: Female
    • Warrington, UK
    • My Gallery
Re: some of my newest additions to my family of Monart
« Reply #10 on: May 27, 2016, 01:06:17 PM »
I think you mean uranium for glowing under UV


Offline chopin-liszt

  • Members
  • **
  • Posts: 9688
    • Scotland
Re: some of my newest additions to my family of Monart
« Reply #11 on: May 27, 2016, 03:58:45 PM »
We were talking about the stuff that glows but not as much as uranium, the manganese.

Yes, Roberta, it's the manganese that turns purple in sun-purpled glass.
Cheers, Sue (M)

If all is not lost, then where the heck is it?


Offline KevinH

  • Global Moderator
  • Members
  • *
  • Posts: 5237
    • England
Re: some of my newest additions to my family of Monart
« Reply #12 on: May 27, 2016, 05:04:05 PM »
A "green glow" under longwave uv light in Monart glass (pre- and post-war) and also in Ysart Brothers glass (1946-1955) is normally due to the manganese. It can usually only be seen in the clear glass.

In my experience (mostly with paperweights) the shade of the "green glow" can vary from a "yellow green" to a "not so bright regular green". Some of the "earlier" millefiori canes with a substantial amount of clear glass (such as when used as the central core) can show up as a seemingly "very bright yellow green" which some folk claim is an indicator of uranium. Whether that is the case or not well beyond my knowledge.
KevinH


 



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