I find it difficult to use the raw/acv curve feature of QTR and usually look
for other techniques such as adjusting the gamma or shadow values, or using
an otherwise unused ink position as a placeholder to move a curves over.
Since you're using all your ink positions, you might try the following:
Rather than trying to neutralize your warm curve using the cool inks as
toners, you could try the following. Create a separate cool curve using your
K and the two toner inks. You can control, to some extent, how deep into the
shadows the darkest cool ink is used by adjusting its density value in QTR.
Then you can cool your warm curve by blending in your cool curve when you
print.
HTH
Tom Moore
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> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of rbehr2001
> Sent: Sunday, November 06, 2005 5:32 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] QTR - Toner reduces Dmax
>
> I recently completed a 5 gray ink set for an Epson 2200 with two cool
> toners. The carbon works great giving a very smooth warm print. The
> problem arises when I try to add cool toner. I get a significant drop
> in maximum black (over .07 in optical density). I tried using the toner-
> curve.raw used by 2200 UT and I tried making my own toner.acv curves.
>
> I assume the objective is to keep the light toner inks out of the deep
> tones. I did that with my curve and also tried various combinations of
> toner shadow, highlight and gamma numbers, but no luck. By the way,
> how can I see/modify raw curves? Photoshop doesn't open them.
>