On the subject of doing clever things with glass - does anyone know
how they make those ornaments which have '3d engravings' inside a
block of glass?=20
They appear to be made out of sets of 'dots', so I'm guessing
something like  focussed pulsed lasers or ultrasonics to create local
micro-cracking.=20


 stOn Mon, 3 Dec 2001 02:00:03 +1100, you wrote:

>Jinx wrote:
>>
>> As part of a PIC project (honestly !!) I need to have some
>> components made of glass. I've contacted a company who
>> could cut glass with high pressure water/garnet but they
>> can't guarantee the work or a low spoilage figure. They
>> suggested polycarbonate, and I suggested right back at 'em
>> that maybe they could cut a mould out of steel plate and I
>> fill it with molten glass. If that fails they will have the cutting
>> file for the metal and I'd get them to do it in polycarbonate.
>>
>> Has anyone in this collective brain of ours any experience,
>> suggestions, tips etc for moulding glass ? Getting a smooth
>> surface on the top (it's a thin disk) could be tricky. I guess I'll
>> have to slide some sort of metal plate on the liquid surface
>
>
>Hi Jinx! :o)
>How detailed is it? How will shinkage when cooling
>affect the molding of the glass? How many details
>that will stick the mold? Mold release agents for
>molten glass temperatures?
>
>One system which is very classy is to look to the
>new epoxy aggregate products, you can add glass
>dust to your epoxy or bronze or other metal dusts
>and it comes out a lot like glass or metal and
>feels modern and exotic.
>
>I got to play with some clear chess pieces that
>were heavy and cold like glass, but also plasticy
>to the touch. Probably about 50/50. I read the
>bronze stuff is 40% epoxy and 60% bronze dust and
>feels a lot like metal.
>
>Some technology like that will look exotic and give
>you all the advantages of cost and ease of
>manufacture. So whatcha makin?? :o)
>-Roman

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