Re: Rubbing alcohol = Isopropyl alcohol? Acetic acid?
99% Methyl alcohol (denatured) is avaialable at auto Stores as HEET. About $2.50 for a 12 OZ bottle. I use it to clean 100s of digtal camera CCDs. RVallon ---- Greg Schmitz <gws1@columbia.edu> wrote: > Mike, > > Rubbing Alcohol here in The States is usually Isopropyl. My suggestion > would be to see if you can get 99% Isopropyl and then dilute as needed. > I buy it at a local supermarket here in Alaska for about 1 dollar (US). > > There is a reasonable description of Acetic Acid at: > http://en.wikipedia.org/wiki/Acetic_acid 28% Acetic is not the same as > Glacial. Glacial is about 99%. Some formulas for stop-baths call for > making a "stock solution" of a lower dilution (such as 28%) which is > then diluted further to make a "working solution." > > -greg schmitz > > > Ross Chambers wrote: > > Dear helpful folks, > > > > I'm sizing up (pardon the possible pun) the logistics of attempting albumen > > printing. > > > > My reference is Mike Robinson's article in John Barnier's book. > > > > My local phamacist would have to order in a litre of Isopropyl Alcohol 70%, > > but has 250ml containers of "Rubbing Alcohol" Are these the same? Intended > > use: to harden the first albumen coat. > > > > And is 28% Acetic Acid the same as Glacial Acetic Acid? > > > > My usual chemistry supplier via their Sydney branch won't normally ship > > volatile acids from their Mebourne chemistry store, but at least they know > > what the use is. Other more local suppliers don't always understand what > > they consider unorthodox uses and it helps to know what ask for. > > > > Thanks - Ross > > =========================== > > Ross Chambers > > Blue Mountains > > New South Wales > > Australia > > maelduin@ozemail.com.au > > > > =========================== >
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