[alt-photo] Re: buffered mat board in the real alternative world

[BOB KISS]

DEAR FRANCIS,
	I always use 100% cotton museum board which has no wood fibers (ergo
no lignin) and (I believe) no buffering because it doesn't need it.  It has
worked very well for Pt/Pd, cyano, and POP for 15 years.
	Given all the work (and cost of materials for Pt/Pd) that goes into
making a print, I just don't feel it is worth any risk using any other
boards.
		CHEERS!
			BOB

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
francis schanberger
Sent: Saturday, January 23, 2010 10:15 AM
To: The alternative photographic processes mailing list
Subject: [alt-photo] buffered mat board in the real alternative world

The following stems from unearthing a stash of buffered Light Impressions
mat board at my mom's house and budgetary constraints.

How bad is buffered mat board for alternative processes? Perhaps one should
consult *The Permanence and Care of Color Photographs* by Brower and
Wilhelm, but I was interested to see what the list is doing i.e what's going
on in the real alternative world.

Knowing cyanotype's sensitivity to alkaline environments, I have always
avoided boards loaded with calcium carbonate but what about vandyke brown
which has an image resulting from the remaining silver and not iron? Is gum
sensitive to pH above 7? Does anyone use the presentation boards that aren't
buffered but contain wood pulp?

-francis
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