Re: Yellow pigments and Gum problem(s)

From: roman sokoler ^lt;>
Date: 11/24/05-02:25:47 AM Z
Message-id: <005901c5f0d0$ad072e80$3001a8c0@sokolerskomp>

Hi Katharine

Yes these three pigments work well for me.

I am more concerned about my choice of pigment could make it harder to do
fine lines in yellow, but I don't read that this is your experience.

I always have to do a correction layer and to get the final print I want -
but then again not everything needs to be perfectly color balanced - to
Sam Wang .

I am sorry to say - but I just got a beautiful picture - testing my tricolor
calibration - and the magenta is completely wrong calibrated - absolutely no
red in the highlights but so nice in the shadows.

I will keep this print - It is a gift and sometimes this gum process i just
so generous.

Thanks for you answer.


From: "Katharine Thayer" <>
To: <>
Sent: Thursday, November 24, 2005 5:02 AM
Subject: Re: Yellow pigments and Gum problem(s)

> On Nov 23, 2005, at 2:58 PM, roman sokoler wrote:
>> Dear List
>> I use Yellow (Schmincke PY154) ,
> Hi roman,
> Actually this pigment (benzimadazolone H3G, PY154) was also on Juan
> Miguel's list of possible yellows from the other day, as Winsor & Newton
> "Winsor Yellow" and I forgot to comment on it then. I've never used this
> pigment, but from its description as a "light to very light valued yellow"
> I wonder if it has the tonal depth to print the range of tones that a
> darker-valued yellow might (it wouldn't have to be a deep yellow, just a
> mid yellow would work fine). But then your statement that it has the
> density you desire seems to contradict that idea. If you're saying that
> the 7 indistinguishable steps are of sufficient density, then that would
> seem to indicate a different problem (overexposure, perhaps?) than if the
> 7 indistinguishable steps are very light in value, which would seem to
> indicate that the pigment itself is just too light (I'm assuming you've
> already ruled out simple things like underexposure and that you're mixing
> the pigment at its maximum strength). This is another case where it would
> be ever so much easier to advise iif one could actually see the thing
> rather than trying to guess from a description.
> But this is starting to sound very much like a discussion from last year.
> If you'll look in the archives for June, 2004, and find a thread called
> "Gum Tricolor Yellow" you'll find a discussion that started out by
> someone asking the very same question, (about a different yellow pigment,
> PY138) The question brought out a lot of good discussion and I think
> probably many of the same comments would apply here. So I'd start by
> reading that discussion.
>> Phthalo Blue (Sennelier PB15) and Quinacridone Red (Sennelier PR122)
>> pigments for tricolor gum printing.
> The only Sennelier paint McEvoy lists under PR 122 is called, according to
> his listing, "quinacridone purple." The color index name for PR 122, in
> other words the proper name for the pigment, is Quinacridone Magenta. I
> can't find my Page or Wilcox to check the Sennelier listing, so I guess
> I'll just have to be puzzled about this "quinacridone red" designation. I
> personally believe PR 122's reflectance curve, with a significant peak in
> blue, doesn't make it a good magenta for tricolor, but it also depends
> no doubt on what the other two colors are, as well as on infinite other
> manner of things. Do you find that this pigment works well for you?
> Katharine Thayer
Received on Thu Nov 24 02:26:02 2005

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