On Mon, 27 Nov 2006 21:53:30 +0100, Roland Harriston <
rolohar@...>
wrote:
> Stefan Trethan:
> I just rechecked the new bottle of iso that I recently purchased from
> Safeway supermarket,
> and it is 99% iso alcohol, not 90% as I might have stated previously.
> Honestly, I don't think that for the purpose of cleaning off home-made
> printed circuit boards,
> the character and integrity of the iso alcohol that one uses is of any
> great significance insofar
> as purity is concerned. If one is doing work for NASA or some Hi-Rel
> defense system, then
> doing the analysis might be important. And even in those cases the
> vendor of the material would
> most likely supply you with those types of quality data.
> Better to spend that time making good, clean PC layouts
> for your projects.
> Besides who has all that lab equipment, and who wants to work to the
> degree of cleanliness
> required to make the measurements meaningful??
> This stuff is supposed to be fun!
> Just my opinion.
> Roland F. Harriston
Well, that doesn't change my curious nature ;-)
The only reason i have not yet used the hydrometer is because i don't have
a suitable container to float it in. The thing is precise and quite high
(about what you'd call a foot). A foot high of alcohol is quite a lot so i
need a narrow container.
But one day i'll find the right glass for it, and then i'll need to know
what the measurement actually means (if it is likely the contaminants are
water or not).
ST