Phil,

If you are talking IPA  vs Ethyl or methanol, the latter is much more 
reactive to resin based fluxes, the other advantage is the 200 proof 
denatured will also dehydrate the device it is used on.    I was taught 
in the Navy to use methanol exclusively.     On the older  formulations 
of 60-40 or 63-37, I feel  there is nothing better, it also has the 
advantage as a de greaser so will remove fingerprints.     When I wash a 
board with ethyl I always position the board vertical and wash from the 
center out.      As a comparison using a spray on de-fluxer causes 
moisture to condense on the board.    Ethyl or methanol removes 
moisture, it is for the most part anhydrous.   If you purchase the 200 
proof food grade version, one must pay the appropriate state and federal 
taxes.    There is a 200 proof, 1% denatured version that doesn't have 
the tax issues, and there is a 190 proof, fuel grade but that leaves a 
residue due to the denaturing agent.


pat goodyear
retired




On Fri, Apr 24, 2015 at 8:12 AM, Nutting, Phil wrote:

> We have had many posts regarding the ability of alcohol to evenly 
> distribute flux and other contaminates over the surface of the board 
> or part.  Does methanol do that same thing?
>
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