[Noisebridge-discuss] High-grit sandpaper?

[Noah Balmer]

TAP plastics probably sells graded plastic polishes that would to the job.
Their NYC equivalents did, anyway.  I used to use plastic polish to clean up
the lexan balls I used for contact juggling, and it was capable of getting
the surfaces to a beautiful glassy smoothness.  I'd also suggest talking to
TAP about making plastic lenses.  They may have some other ideas besides
grinding epoxy.

Epoxy dust is not the safest stuff.  Because mixing ratios are never
perfect, it contains uncured resin or hardener.  Exposure often results in
developing an allergy-like sensitivity.  A dust/mist respirator is
preferable to cheap paper masks.

-N

On Sat, Jun 6, 2009 at 6:37 PM, Josh Myer <josh at joshisanerd.com> wrote:

> Put another way: has anyone ground lenses out of epoxy?  It's a bad
> idea on several levels, but the material is cheap and readily
> available, and I'm guessing epoxy dust is a lot less harsh on the
> lungs than glass dust.
>
> Does anyone have a source for really high-grit sandpaper in the city?
> I'm playing with figuring chunks of epoxy, but they come out cloudy
> with the highest grit paper Ace sells (1500).  I think getting up to
> 3200 might be sufficient to clear the thing up, but I'm not sure.
> Also, any leads on a place with a range of jeweler's rouges?
>
> It may be that the easiest way to get transparency is to recoat with a
> fresh layer of epoxy, but that seems fraught with misfiguring peril.
>
> Once I figure out how to restore them to transparent, there's a really
> trivial and fun way to hand-make toy lenses and optics on the cheap.
> Depending on just how bad epoxy dust is for you, it would even be
> suitable for craft hour at Hackindern, the noisebridge daycare.
> --
> Josh Myer   650.248.3796
>  josh at joshisanerd.com
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