[alt-photo] Old buffer
henry.rattle at ntlworld.com
Fri Mar 1 13:59:48 GMT 2013
One of the first major things I've learned from Christina's new book is why
my cyanotype prints have been so pale, so often, for more years than I care
to admit. I have learned over time to "develop" them in water acidified with
acetic acid to about pH 5-6, which helps, but because all the papers I use
(Waterford, Bockingford, Artistico) are (as I now understand) heavily
buffered, it just seemed to be the way things are.
After reading Chris's chapter, I tried some different, cheap (and presumably
unbuffered) paper and lo and behold! Deep blues!
So - Chris suggests pre-acidifying paper for cyanotype in 5% hydrochloric
acid. This seems pretty ferocious - I think it's about pH 1? - so doesn't
that damage the paper in other ways? Has anyone found gentler ways of
neutralising the buffer in these nice papers?
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