[CentOS] died again

[Michael Hennebry]

On Wed, 4 Dec 2013, Warren Young wrote:

> On Dec 4, 2013, at 1:22 PM, Michael Hennebry <hennebry at web.cs.ndsu.nodak.edu> wrote:
>
>> On Wed, 4 Dec 2013, Warren Young wrote:
>>
>>> At $11 for a couple of
>>> tiny bottles, both of which you have to use together, it's another 2-3x
>>> more expensive than tape head cleaner.
>>
>> For me, the bottom line is how much it will cost
>> to clean *one* CPU/heat spreader combination.
>
> Because I always have a Menda bottle full of high-purity alcohol on the electronics bench, I find many uses for it.
>
> If I had to drive to Radio Shack every ounce or so to get a refill, I would doubtless not bother for most jobs.

I don't have an electronics bench.
For me, this is a Very Special Occasion,
one that I hope notto repeat for a long time.

>>> 100% is possible if you synthesize it
>>
>> I'm not sure what you mean by synthesize in this context.
>
> I mean assemble the molecules from bulk quantities of their constituent elements. :)  Chemical engineering.

That is what I thought you meant.  I'm not sure that is even possible.
Judging from Wikipedia, no one makes it that way.

> As my measurement data in the post I just sent hints, there are serious practical problems -- aside from the direct economic ones -- that restrict the utility of such high-purity alcohols.  There's probably no point using it outside a cleanroom.  Dust on the glassware will wreck the purity rating otherwise.

I wasn't planning to look for 99.9% pure isopropyl alcohol.


-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods