Re: gEDA-user: Isopropyl alcohol vs. ethanol

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

On Sun, Apr 23, 2006 at 10:51:43PM -0400, Marvin Dickens wrote:
> Karel Kulhavy wrote:
> >Is it true that PCB's should be washed by isopropyl alcohol and not
> >ethanol because ethanol has small molecules that creep into the part
> >cases and wreak havoc there?
> >
> >  
> I've never heard of washing PCB's in ethyl alcohol or isopropyl alcohol. 
> In fact, - Yuk.
> 
> Both isopropyl alcohol and ethyl alcohol are both  reasonably flammable 
> at 70% purity or above.
> Further, isopropyl alcohol has a low vapor pressure. In the long term, 
> without a well thought out
> ventilation system, flash fires would occur (Not if- but when....).
> 
> We wash our boards in a mild solution of distilled water, clear ammonia 
> and a mild surfactant.
> This is followed with a wash with distilled water. The boards are then 
> dried for several
> hours in a drying oven.

But does ammonia dissolve rosin?

CL<
> 
> 
> 
> Best
> 
> 
> Marvin