Re: gum arabic
Hi Laura,
Kordofan (acacia senegal) is what you want. The terms (kordofan and
acacia senegal) seem to be used interchangeably in the industry and
are simply different terms for the same thing. I don't know what the
other is, but since it's not specified as Kordofan or acacia senegal,
I'd be leery. Also, sort is important; the kordofan, labeled (1)
will be a higher (finer) sort than the other, at sort 3. Hope that's
helpful,
Katharine
On Jan 15, 2009, at 9:23 AM, Laura Valentino wrote:
L. Cornelissen & Son (www.cornelissen.com)
Prices in GBP for 100g; 250g; 500g; 1kg:
Gum Arabic (Kordofan) No. 1 — — 4.25 6.70 11.10 19.95 — —
Gum Arabic (Nigerian) No. 3 — — 4.10 6.45 10.30 18.35 — —
I have used already mixed gum from Bostick and Sullivan, and it's
fine, but too expensive to ship the liquid stuff. I've also tried a
powdered gum that was given to me and I have no idea the origin of,
and it was fine too. So I'm not really being picky! I believe the
stuff from Cornelissen is "lumps". I'm assuming it should be a high
quality grade, since this is intended for fine art pigments.
Laura
Kordofan was historically thought to be the best, though many said
the gum didn't make a dif where it came from (Africa, Sudan,
Sengal, East India, Alexandria). Kuehn preferred Kordofan, and
then Ghenziri, and said Senegal gum did not print well, lifting
off more readily and leaving a residue.
Since I have never had much choice in location of gum I never gave
it much thought, actually, but I much prefer the gum Daniel Smith
sells that is very light in color. But I do wonder how much
difference gum makes from the different places....
Chris
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Christina Z. Anderson
http://christinaZanderson.com/
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----- Original Message ----- From: "Laura Valentino" <laura@this.is>
To: "Alt Photo Process" <alt-photo-process-l@usask.ca>
Sent: Thursday, January 15, 2009 9:20 AM
Subject: gum arabic
The company I order my art paper from has gum arabic in 2
varieties: Gum Arabic (Kordofan) No. 1 and Gum Arabic (Nigerian)
No. 3. Any idea what the difference is? Would either be fine for
gum bichromate?
The woman I talked to told me these were for mixing with
pigments, and the Kordofan was favored for watercolor pigments.
Thanks!
Best Regards,
Laura
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