On Sun, 27 Nov 2005, Judy Seigel wrote:
My bad forward -- the query was from mark Nelson not Chris...
> On Wed, 23 Nov 2005, MARK NELSON wrote....
>
>>> If PH does affect Gum, then like Cyanotype and other processes, would gum
>>> not
>>> work well with a highly buffered paper?
>
>
> They don't publish a schedule of how "highly" buffered the papers are, and
> though pH may affect gum, we don't know the actual effects, nor if or how it
> might affect the actual print with the other ingredients and process added.
>
> That said, most "art" papers are buffered -- which is why many of them are
> NOT good for cyano.
>
> However, if you want to measure the pH of paper (like we need more things to
> measure) Light Impressions sells a pH pen which will give a measure of sorts
> -- probably crude, but still the gist. And has its uses at all sorts of
> moments.
>
> J.
>
>
Received on Sun Nov 27 22:01:56 2005
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