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QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

Message

Re: [QuadtoneRIP] the worst step wedge in history

2008-03-14 by Howard Shaw

rkamarowski wrote:
 > i'm attempting to create a digital negative using an epson 3800 on
 > pictorico ohp transparency film. in the bob k. folder i've put a jpg of
 > the scan and the qidf file i'm using.  if someone has time could they
 > take a look at steer me in the right direction?
 >

Looks like the partitioning is at fault. As an example, the Silver Rag 
warm profile that's part of the qtr download looks like this:

N_OF_GRAY_PARTS=3
GRAY_INK_1=K
GRAY_VAL_1=100
GRAY_INK_2=LK
GRAY_VAL_2=52
GRAY_INK_3=LLK
GRAY_VAL_3=15

Yours looks like this:

N_OF_GRAY_PARTS=3
GRAY_INK_1=LK
GRAY_VAL_1=30
GRAY_INK_2=LLK
GRAY_VAL_2=11
GRAY_INK_3=K
GRAY_VAL_3=1

You've also got some copy_curve stuff going on and I'm not sure what 
you're trying to achieve there. I would try using one of the existing 
profiles as a starting point.

Howard
--
www.howardshaw.org

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