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From: bright@dataioDataio.UUCP (Walter Bright)
Newsgroups: net.periphs,net.micro.pc
Subject: Re: adjusting PClone drives
Message-ID: <1017@dataioDataio.UUCP>
Date: Thu, 12-Jun-86 12:57:41 EDT
Article-I.D.: dataioDa.1017
Posted: Thu Jun 12 12:57:41 1986
Date-Received: Tue, 17-Jun-86 08:16:32 EDT
References: <336@vu-vlsi.UUCP> <1860@gitpyr.UUCP> <9879@ucsfcgl.ucsfcgl.UUCP>
Reply-To: bright@dataio.UUCP (Walter Bright
Organization: Data I/O Corp., Redmond WA
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Xref: watmath net.periphs:1094 net.micro.pc:8661

In article <9879@ucsfcgl.ucsfcgl.UUCP> russack@ucsfcgl.UUCP (Joe Russack%CGL) writes:
> wouldn't use alchohol on the heads- it leaves a residue, and a residue
> on your heads is the classic definition of no fun. Use something that
> won't leave a residue of any sort (I believe ammonia won't, but I am
> not sure). Also: a Q-tip s 
>not a great idea, either. A cotton swab (medical quality) would be better- it 
>tends to have fewer abrasive fibres in it. 

Rubbing alcohol leaves a residue, as it is only about 70% alcohol and has
additives. Use denatured alcohol, which is about 97% or 98% pure, and
evaporates cleanly. Denatured alcohol is available at most drugstores.

Denatured alcohol is essentially pure alcohol with a small amount of
poison added in order to make it undrinkable (to escape the liquor tax).

Laboratory alcohol is 98% pure (2% water). It is apparently impossible
to eliminate that last 2% of water. Any chemists out there care to
explain why?