[alt-photo] Re: Testing Paper PH

[Greg Schmitz]

  You're welcome, I'm sorry I was so brief, I'm working on a project and 
just sort of watching the list out of the corner of my eye.  FWIW, many 
of the issues that are important to us, are also important to folks in 
the conservation and preservation communities.  The first time I heard 
of "hot extraction" and "cold extraction" was when some conservation 
students asked to use my pH meter to determine the pH of leather from 
some old bindings.

Thinking out loud there are some issues that come up from time to time 
that are important to what we all do.  I wonder if maybe we might 
benefit by writing FAQs, or at least creating a bibliography that might 
point others to relevant sources (and to help folks like myself who 
forget more than they remember) on topics of note.  Just a thought - I'd 
be willing to help.

later --g

On 7/28/10 8:56 PM, ender100 at aol.com wrote:
> Hey Greg,  Thanks for the link!  I appreciate it!
>
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>
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> -----Original Message-----
> From: G Schmitz<coldbay1 at gmail.com>
> To: The alternative photographic processes mailing list<alt-photo-process-list at lists.altphotolist.org>
> Sent: Wed, Jul 28, 2010 10:08 pm
> Subject: [alt-photo] Re: Testing Paper PH
>
>
> The primary methods for testing pH in paper conservation involve using either "hot extraction" or "cold extraction."  It is usually best to used distilled or boiled and cooled water since CO2 concentrations in the water can lead to a "false" reading.
>
> See for example:
>
> http://ipstesting.com/T509pHcoldextract/tabid/155/Default.aspx
>
> searching ConsDist might also provide some insights:
>
> http://cool.conservation-us.org/byform/mailing-lists/cdl/
>
> --greg
>
> P.S. I know this topic has been discussed at some length before.  Might be worth giving the archives a poke.
>
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