Re: Grayscale info from separators/printers
Re: Grayscale info from separators/printers
- Subject: Re: Grayscale info from separators/printers
- From: Ernst Dinkla <email@hidden>
- Date: Thu, 08 Dec 2005 09:59:18 +0100
Christopher Bain wrote:
We're getting pretty accurate results with our CMYK conversions, utilizing the specific CMYK ICC profiles supplied by the printers of our various 4/c jobs, from book covers to calendars. They are closely matching our monitors (softproof) to the degree possible. However, for an upcoming book that will be printed in grayscale, the "originals" are files from a variety of sources, arriving in a variety of color spaces, some tagged, some not, some in grayscale, some in RGB (even though they look B&W to the eye). Is there a preferred method for prepping the files and tagging them for the printer other than just assigning a 15% or 20% dot gain? If I can get the dot gain measurements from the printer for their quarter tones, half tones, and three-quarter tones, is it better to build that conversion, and is there a good few pages in anyone's book on this type of workflow? RWCM doesn't even have grayscale in the index. We have a bit of time, and a very cooperative printer in t
he Orient, and the slightly cream based paper will suck up the
ink, since it is intended to be written on with pen and pencil
alike.
Chris Bain
Never intended to be used for that kind of work but you could
check what the Quadtone Rip with its greyscale profiler could
do for you. If the printer prints several 21 - 51 step targets
on a linearised press and you make the profile with the target
it should work. Convert or assign (untagged) 2.2 Gamma (or the
QTR Greyscale space) to the images, edit them in Photoshop and
convert them to the new printer profile in PS. All steps after
that without color management so instruct the printer.
Photoshop is the only application the QTR profiles are used in
(so far) so experimenting outside that environment is tricky.
www.harrington.com
Quad inks on the press would be better of course.
It is still dotgain and gamma that is the standard for B&W
editing + printing, strange that there hasn't been much
influence from color management R&D in that area. No replies
on Steve Kale's question suggests that it is still Terra
Incognita and there's no desire to draw the lines on the map.
--
Ernst Dinkla
www.pigment-print.com
( unvollendet )
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