[Alt-photo] Gum pigment mixed in batches

Denny dspector at charter.net
Tue Jan 9 04:54:43 UTC 2018


Francesco,

I routinely mix gum and pigment in large batches and I've had no problems.
Just don't include any dichromate,  and mix well before using each time. 

Denny

-----Original Message-----
From: Alt-photo-process-list
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Francesco Fragomeni via Alt-photo-process-list
Sent: Monday, January 08, 2018 8:45 PM
To: The alternative photographic processes mailing list
Subject: [Alt-photo] Gum pigment mixed in batches

Hi all,

Quick question. I'm sure this has been asked but I can't find it. Can gum
bichromate pigment be premixed in larger batches rather than being mixed at
coating time? I'd like to mix stock pigment solutions and keep them stored
in glass bottles that I can reach for across printing sessions (rather than
mixing fresh for each print). Is there any reason not to do this? I think
I've heard of people doing this but wanted to double check. Thanks!

-Francesco
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