Re: Rubbing alcohol = Isopropyl alcohol? Acetic acid?

[Greg Schmitz <gws1@columbia.edu>]

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
>
> ===========================