From: Katharine Thayer (kthayer@pacifier.com)
Date: 11/12/01-02:58:40 AM Z
Art Chakalis wrote:
>
>
> Hi Katherine,
>
> The text near the end of the paper was/is difficult to follow. In
> addition I was not clear in my statements . . . lets try this again.
>
> Take a look again at the last paragraph on page 237.
Okay, we're not communicating here. You're right, let's try this again.
As I see it, there are two questions at issue here. One is what the
article says. The other, completely apart from what the article says, is
whether it makes sense, if you are a four-color printer, to make the
black printing by mixing the three primary colors rather than just
printing straight black.
I'll dispense with the last question first by saying, as I said before
but apparently didn't say completely enough, that since I'm of the
school that doesn't add a black layer because the three color printings
are sufficient, I'm not the one to answer the question of whether it
would be a good thing to substitute a mixture of the primary colors for
straight black in the black printing.
Now, to what the article says, which on re-reading I still believe I
summarized quite well but apparently my summary wasn't sufficient. Let's
go to the actual wording of the paragraph to which you refer:
"By this new method, a first print is made merely to show the location
for placing the various colors and tones. Such a print may be a pale
platinum print, which will give a black foundation for the color [giving
a "broken" color]. A method of obtaining ***much purer*** color effects
is, ***instead*** of using a platinum print as a base, to make a
gum-print in full detail with a mixture of three equal parts of the
three primary colors: ****result, ecru*******. If you do this, you will
be surprised how much purer the colors to be printed upon this base will
appear than you would imagine."
I think the confusion lies in our assumption that mixing the three
primary colors always results in black. This is true only if the colors
are very concentrated. In order to get ecru as a result of mixing the
three colors, you would have to mix them in a very unsaturated
concentration. To me, he's saying very clearly here (but I do accept
that there is room for disagreement of interpretation) that to his mind,
the colors printed over ecru are much purer than the colors printed over
black (platinum).
I don't recall anyone printing a black layer with color gum, other than
using a platinum print as a base, that early. If you can show me exact
examples, I will stand corrected.
Katharine Thayer
>
> A black printing is not that unusual and though he used a platinum print
> in his example, a gum printing in black is a viable alternative. A black
> printing increase density and helps overcome/hide slight pigment color
> variations from the actual primary colors.
>
> My point of interest lies in replacing black with a mixture of the primary
> pigments to create a black color. The very last sentence on page 237 is
> what I have an interest in determining if anyone out there has any direct
> experience/knowledge they are willing to share.
>
> Sincerely, Art
>
> Art Chakalis
> Columbus, Ohio, USA
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