Yes, Expensive enough to do a needs/cost/benefit reality check! My point was that greater than 99% purity was available... As a hobbyist, I would start with hardware-store grade materials and test my way up the cost ladder to a reasonable result for the application. Roger On 1/5/2016 8:01 PM, Jean-Paul Louis louijp@... [Homebrew_PCBs] wrote: > > WOW, that\u2019s 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 \u201cAlcool rectifi�\u201d which translate approximately by > rectified alcohol. > >> > >> My $0.02, > >> Jean-Paul > >> N1JPL / ex-AC9GH > >> > >> > On Jan 5, 2016, at 7:02 PM, alienrelics@... [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 > >> > > >> > > >> > >> > > > > > > > >
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Re: [Homebrew_PCBs] Heatless (cold) Toner Transfer for PCB making
2016-01-06 by Roger Blair
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