Homebrew PCBs

To get it past 96% maybe they distill the alcohol again to further reduce the water content ?  remember alcohol boils at a lower temp than water that is how a still leaves the water behind. I would think the alcohol is only being used in the toner transfer process as maybe a carrier?  Most toners I have seen are polyester based and acetone will dissolve them. You can for example clean vinyl with acetone but you must dilute with water or it will dissolve it.

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Tuesday, January 05, 2016 11:01 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Heatless (cold) Toner Transfer for PCB making

 

  

WOW, that’s really expensive! $144.10 per liter + hazardous material fee + shipping.

Jean-Paul
N1JPL

> On Jan 5, 2016, at 9:18 PM, Roger Blair Roger.Blair@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
> 
> FYI...
> http://www.sciencelab.com/page/S/PVAR/SLE2248
> 
> General Chemical Specifications: Assay (C2H5OH; by Volume) Min. 99.5% Water (H2O)0.2%
> Roger Blair
> 
> On 1/5/2016 5:43 PM, Jean-Paul Louis louijp@... [Homebrew_PCBs] wrote:
>> 
>> Pure Ethyl Alcohol (Ethanol) will be the hardest to find in the US. All the pharmacies in the US now carry IPA (Iso Propyl Alcohol) which is not Ethanol. 96% purity limit for current ethanol is not by accident. It is the maximum purity that you can obtain by distillation. In order to get 99%, you need to use a different process that will go beyond the 96% limit. I do not know the english name of the process.
>> When I was in France, 99% Ethanol was available at any pharmacy and was called “Alcool rectifié” which translate approximately by rectified alcohol.
>> 
>> My $0.02,
>> Jean-Paul
>> N1JPL / ex-AC9GH
>> 
>> > On Jan 5, 2016, at 7:02 PM, alienrelics@yahoo.com [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
>> > 
>> > It says Ethyl Alcohol, which is often denatured. Not everyone uses the same denaturing agents.
>> > 
>> > 
>> > However, in one of the comments he says:
>> > "The one I use is Ethyl alcohol (pure 96%) also called Ethanol. It's the one used as antiseptic."
>> > 
>> > Medical Ethyl alcohol seems to be about 95% or so.
>> > 
>> > Hardware store denatured alcohol seems to be about 90%.
>> > https://en.wikipedia.org/wiki/Denatured_alcohol
>> > 
>> > Some people in the comments mentioned Everclear. It seems to be sold in 75.5% (151 proof) and 95% (190 proof).
>> > 
>> > Steve Greenfield AE7HD
>> > 
>> > 
>> 
>> 
> 
> 
>