Posted 9 years ago
IanBrighton
(573 items)
It's a relative biggie at 19cm high x 17cm diameter. The murine give the impression of multiple flower heads.
Kralik Iris millefiore vase | ||
| Bohemian Art Glass4005 of 6875 |  |  |
Kralik Iris millefiore vase | ||
| Bohemian Art Glass4005 of 6875 | | |
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Posted 9 years ago
IanBrighton
(573 items)
It's a relative biggie at 19cm high x 17cm diameter. The murine give the impression of multiple flower heads.
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Nice one!!
Thanks, Craig, it is almost satin. I think the final layer before iridising was satin to give the less mirrored effect. What do you think?
I am not 100% sure. It is possible that the application of the chemicals used to create iridescence also gives the glass a bit of a satin look.
Satin glass itself is generally produced using hydrofluoric acid or hydrofluoric acid fumes.
According to the Corning Museum of Glass:
"On certain 19th- and 20th-century glasses, iridescence is a deliberate effect achieved by the introduction of metallic substances into the batch or by spraying the surface with stannous chloride or lead chloride and reheating it in a reducing atmosphere."
That definition, and many useful glass terms can be found here:
http://www.cmog.org/research/glass-dictionary
I believe the satin type iridation is due to different process... it's basically baked in a chamber with metallic vapour for long time instead of just blown over. (in that case I believe you would get more reflective, mirror like iridescence).
does anybody know of some good resources for info on this subject? I was looking for it some time ago and did not come up with anything good.
The carnival glass folk believe the glossiness/satination of the iridescence is temperature related. Iridising affects the surface layers of the glass so the glass must be very hot. Satination/frosting is a cold process, so it would be unlikely before hot work/treatment was finished. Enamelling is one treatment applied to cold glass that then requires reheating, but to a relatively low temperature, and it doesn't actually affect the glass; the enamel just becomes well stuck on
Thanks for your inputs on this. Appreciated.
Oh wow Ian!! I love the colors! And that satin finish? Gorgeous!!!