Re: DIY light source for 10X10" enlarger.

Serves me right for not checking a bottle in the medicine cabinet--I 
thought that chemicals labeled USP were "pure."  At any rate, ethyl 
alcohol USP is not denatured, is it?

	David

Nicholas O. Lindan wrote:
> "David Kazdan" <dxk10@[EMAIL PROTECTED]
> wrote
>> Are you sure on the medical ethanol?
> 
> The key words seem to be 'rubbing' and 'USP'...
> 
>  o "Rubbing alcohol" w/o USP is 70% isopropanol
> 
>  o "70% isopropanol USP" is not, TTBOMK, labeled 'rubbing'
> 
>  o "Rubbing alcohol USP" is 70% ethanol w/ acetone and bittering
> 
>  o "Alcohol USP" is ethanol
> 
> I think the logic is that acetone is less poisonous than
> isopropanol and paying ATF tax on ethanol for use as rubbing
> alcohol is bad for the bottom line not to mention it's
> effect on the level of sin in both the massage parlour
> business and the hospital's PM&R department.
> 
> Advice worth price charged and if challenged I
> will disavow all knowledge ...
>