Re: Pigment/gum ratios
P.S. Another example, with visual, of how I alter the stock mix for
different uses. My stock mix of ivory black prints black, but when I
want a rich brown color, I add a little gum to the stock mix. The
warm black turns a rich brown when slightly diluted, that's still
dark enough to print nicely as a one-coat. This is actually a reject
print, but it shows the effect I'm talking about well enough, even
though it's otherwise flawed:
http://www.pacifier.com/~kthayer/html/kids.html
Katharine
On Feb 14, 2007, at 10:46 AM, Katharine Thayer wrote:
Then I use that stock mix in various ways, depending on what I'm
doing. For a one-coat gum, I'll use the stock mix straight. For a
multiple gum, I'll most often use a diluted mix, because while in a
one-coat gum you want the greatest DMax that a pigment is capable
of, in multiple gums, and especially in tricolor, to use each
pigment at the maximum color saturation would result in poor tonal
balance (too dark) and probably poor color balance as well, because
pthalo especially needs to be backed way down to balance against
the other two colors. And I will adjust the mix to achieve
different aesthetic goals; for example, for the very high-key work
I was doing 2001-2004, I added a huge amount of gum to the mix
(like 1:10) to achieve very pale, almost invisible, colors. And I
often mix the mixes to create different colors, as well.
Katharine
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