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Digital BW, The Print

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Re: QTR: hitch in the grayscale ramp for EEM_2200-cool?

2003-10-17 by David Wroblewski

Hi Costa, that's interesting. Coupla questions.

First, how do you set up an image to print a single-ink
tone ramp as you describe? I know this must be basic
but I've never seen it explained in my half dozen photoshop
books. QTR even has a file, inkpattern.psd, that prints 7
different single-ink step wedges, but it uses some CMYK magic
that I just cannot get my head around. Sorry to be the
class dunce.

Second, doesn't your method assume that all the inks have the
same transition point(s)? Is that a safe assumption?

-david

--- In DigitalBlackandWhiteThePrint@yahoogroups.com,
    "ccolbertbw" <ccolbert@u...> wrote:
> I went through the same sort of adjustments for the SC 980.  I found that
> printing a smooth (1%) gradient with a single ink made it much easier to
judge
> whether the dot size values were correct. This is because it is not
transitions
> between inks that are the issue here, but instead the transition from one
dot
> size to the next (within each ink). In other words a gradient with only
one ink
> will show the "hitches" just the same.  After changing the dot  values,
the
> single ink gradient looked smooth and then the full ink set fell right in
line.
>
> Costa Colbert
>

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