Re: tricolor gum question - yellow
I don't remember the details, including the color names/numbers, but this
question (or similar) came up earlier this year. I haven't used any of
the named yellows in tricolor gum, but have used "cadmium" this and that
in offset printing and printing/painting in several media. So I repeat
what I said then. (If I recall correctly, Katharine corrected me then, but
hasn't done so yet this time -- & I don't remember the correction anyway--
sorry Katharine !)
AFAIK, and generally speaking, a *cadmium* pigment is sincerely opaque...
so whatever the alleged *hue* (by any name) a true cadmium yellow would
drown out (ie., cover) the colors under it more than is desirable in
tri-color gum. This might well be obviated simply by using it as first
layer, tho then of course registration for the next coat is trickier.
Meanwhile, as I recall, most of the effects of tri-color gum depend on a
certain degree of transparency in the layers... plus, by definition,
watercolors are supposed to be transparent. (Doesn't it usually say on the
label "transparent watercolor"???)..... Opaque watercolors are generally
called gouache, made so by addition (generally speaking) of white. (Tho
again, that's traditional -- nowadays you can call any damn thing you want
any damn name you like-- especially if you put "new" in front of it.)
Judy
On Wed, 18 Nov 2009, Katharine
Thayer wrote:
Hmm, okay.... Maybe I should have been more precise: Daniel Smith is the
only paint manufacturer I'm aware of whose "quinacridone gold" is still pure
PO49. The idea of mixing PO49 with pthalo green seems rather dubious to me;
obviously they're trying to eke out what PO 49 they've got left by mixing it
with other stuff, in this case greying it down with an approximate
complement, which would tend to neutralize the warm tone of the PO49. At
any rate, pure pigments are always superior to mixtures, IMO.
On Nov 18, 2009, at 2:14 PM, Paul Viapiano wrote:
Sennelier Q Gold is PO49 + PG7
Paul
----- Original Message ----- From: "Katharine Thayer"
<kthayer@pacifier.com>
To: <alt-photo-process-l@usask.ca>
Sent: Wednesday, November 18, 2009 10:24 AM
Subject: Re: tricolor gum question - yellow
Yes, Daniel Smith is the only manufacturer still using PO 49; the last
of other lines ran out in 2005. So if other brands are still selling
paint called "quinacridone gold" or intending to substitute for
quinacridone gold, it's a mixture of pigments, most often nickel azo (PY
150) with a red pigment.
On Nov 18, 2009, at 9:48 AM, Linda Stinchfield wrote:
Thank you for the information on quinacridone gold. I used to get it
from Golden, for painting in acrylics, and loved the way it mixed with
other colors. Then the formula changed, the name became Q. gold nickel
azo... and it didn't mix the same at all. It was a huge disappointment.
Last year I found the Daniel Smith Q. gold watercolor and acrylic paints
and have bought several tubes of each. Maybe I'd better buy some more...
Linda
On Nov 18, 2009, at 6:15 AM, Katharine Thayer wrote:
Actually, PO 49 (quinacridone gold) hasn't been manufactured since
2001. Daniel Smith bought up a lot of the available supply at that
time; I was told then that there was enough to make paint into the
foreseeable future; the person I talked to said "Don't worry, we've
got plenty." I haven't checked back since to see how their supply is
holding out. But don't buy it, because Keith and I want it all.
On Nov 17, 2009, at 6:25 PM, Keith Gerling wrote:
I love Daniel Smith quinacridone gold. While I use 3 blues and 8 or
so reds, the only yellow I use is the Quin Gold. Very transparent.
Warm, and not garish.
Don't buy it though. Rumor has it that the pigment was created for
the automotive industry (that gold PT Cruiser!) and that it won't be
made anymore. So I want it all for myself!
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