> I do some glass blowing myself. Pressed (molded) glass is never ok
> without polishing even for the simplest optical tasks. If your item is
> decorative then you may get away with it. A clock face is not (did I
> guess ? ;-).

Close. I went down to the glass shop yesterday. They get all sorts
of odd enquiries, as the arts community in Titirangi is nearby. And
they're a fussy snooty daydreamy lot up there, or "The Raffia" as
they're known

Anyway, they told me pretty much the same. Even if you keep the
glass molten and the mould hot, it is hard to get a perfect surface all
over without some work

> The smoothest surfaces are obtained by pouring molten glass onto
> a liquid metal bath. This is the way most window glass is made.
> You could in theory have the molten metal bath spin to create a
> meniscus and pour into that but I suspect that you do not have a
> free room in your glass factory to accomodate the equipment ;-).

And also it doesn't address the shapes I want unfortunately
>
> Make a nice drawing and find a local glassblower artisan shop imho.

He'll love all the sticky-out bits. Think it's time I paid a visit to the
laser cutter and get them to do it in polycarbonate. When it comes
to glass, I'll stick to lead-lighting

Thanks for the background info

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