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Frit-Happens !

Lampwork => Lampworking Tip n Tricks => Topic started by: Buzzybead on July 15, 2007, 07:32:33 PM

Title: Filters
Post by: Buzzybead on July 15, 2007, 07:32:33 PM
I seem to remember that Sal mentioned using polarised filters to check  beads for cracks. Have I remembered this correctly and if so could someone give me some more information ( like where to get hold of them) I'm always terrified of using beads that may have slight hairline cracks in them ( slit throats springs to mind)
Title: Re: Filters
Post by: Marijane on July 15, 2007, 07:41:37 PM
They show up the stresses in an unannealed bead.  If you want to look for cracks then a magnifying glass might be better.  The stresses look like a dark cross within the bead.  Facinating stuff.  You can use it with a transparent bead to confirm that your annealing cycle is doing it's stuff.

Mari
Title: Re: Filters
Post by: Sarah on July 15, 2007, 07:56:20 PM
Claire

Try this link - there's a lot of other stuff too but I think you'll find what you're looking for
Title: Re: Filters
Post by: Buzzybead on July 15, 2007, 08:08:25 PM
Sorry - I can't see a link yet ??? Sounds interesting though Sarah.
Title: Re: Filters
Post by: Sarah on July 16, 2007, 01:40:59 PM
Oops

::) ::)

http://www.frit-happens.co.uk/forum/index.php?topic=2057.0
Title: Re: Filters
Post by: Buzzybead on July 16, 2007, 09:53:55 PM
Thanks Sarah!  ;D
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