Iridescent glass

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    Does anyone know how the iridescent coating on stained glass is
made, and what the stuff is made of? I'm wondering how to remove
select areas on a piece.



Re: Iridescent glass
No Body wrote:
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I do not know the formula.
In principle it is a thin deposit of metal,

It can be removed by sandblasting, etching or abrasive tools.
-lauri

Re: Iridescent glass

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different manufacturers use different chemicals. a bunch of them use tin
chloride fumed on when the glass is coming out of the rollers and still hot.



Re: Iridescent glass
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    Since I have it about, what sayest thou to brushing on etching
paste, aka hydroflouric acid?




Re: Iridescent glass
No Body wrote:
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It should work but
Be extremely carefull, read the safert notesand MSDS first.
It is dangerous stuff.
As always test on a scrap first
-lauri

Re: Iridescent glass
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HFC is truly horrific stuff but the amount contained in Etching Creme
is too little to be of serious concern.  It's commonly used by
thousands of hobbyists.

For anyone considering using HFC, here's an article explaining why
they should reconsider.
http://www.glasscampus.com/tutorials/pdf/Hydrofluoric%20Acid.pdf

Re: Iridescent glass
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The irid surface can easily and safely be removed with sandblasting or
etching cream.  If you want, you can return a full smooth gloss to the
etched parts by fire polishing in a kiln.  Pieces done that way can
look delicately elegant.

Re: Iridescent glass
Quoted text here. Click to load it

The irid surface can easily and safely be removed with sandblasting or
etching cream.  If you want, you can return a full smooth gloss to the
etched parts by fire polishing in a kiln.  Pieces done that way can
look delicately elegant.


    Thank you! That is very good to know!



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