Re: [DIYbio] Can't find supplier for ~1 inch Viton stopper

On 08/29/2014 10:36 AM, Nathan McCorkle wrote:
> I'd like to try and keep the chemical list down to a minimum, as
> certain materials like to off-gas for a very long time and that
> behavior can foul the vacuum and imaging system contained therein.


OK, now I get that you're working on getting real vacuum over time
and are investigating low cost rubber and wire, so that's why the piano wire
idea. Piano wire rusts though...

Probably you could get decent results with a sharp sewing needle threaded with some
stainless wire. A #16 or #18 needle could be just right -- they come with standard sharp
points, rounded points triangle knife points for leather. Standard is going to be good for your
test, and qty ten available on ebay for $4 shipped. Maybe even hone it
some on a fine ceramic whetstone, or piece of alumina like an
old X86 computer chip package...those light purple ceramic computer chip packages.

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