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Building profiles

Building profiles

2003-07-18 by Andre Vallejo

As always,I'm trying to consistently match my mono prints (MIS-UT-FSN,Epson 1160,matte and smooth pearl paper). 
So I wrote to a known professional profiler maker to see if I could have one made for this combinations. I quote the answer:

" Quad-tone ink sets require proprietary software code to be used instead of the standard color ink set.  Standard color ICC profiles are not useable with these ink sets because of the proprietary software code.  The only place you can get profiles for quad-tone ink sets is from the supplier of the specific ink set.  "

I'm not sure I understand what the problem is...If one has the spectrophotometer,the printed patch and the profiling software,what's the problem?

Best

Andre Vallejo
www.andrevallejo.net


[Non-text portions of this message have been removed]

Re: Building profiles

2003-07-19 by Andre Vallejo

Seems more clear now Tyler,thanks...!



Message: 24        
   Date: Mon, 19 Jul 2004 02:14:21 -0000
Show quoted textHide quoted text
   From: "Tyler Boley" <tyler@...>
Subject: Re: Building profiles

A CMM uses ICC profiles to remap input color to the nearest printable
color the device/paper/ink can manage.
Quadtone profiles require density remapping for propper gradation, but
also assigning different tonal areas of the input to their apropriate
quad ink. This assumes a standard color driver without this
partitioning capability built in. The ICC approach and profiling
software has no way of knowing you want to send all your highlights to
a light gray ink that happens to reside in the yellow ink tank, then
smoothly transition to a darker ink that happpens to reside in the
magenta tank, etc...
This isn't to say you coudn't profile it, and even print through your
profile with possibly some success, but there will be no ink
partitioning to take advantage of using a quad inkset.
Color management, with the use of a profile, simply remaps color from
one defined space to another as closely as possible given the
characteristics of the two spaces.
Hope that makes sense.
Tyler

Re: [Digital BW] Building profiles

2004-07-19 by Carl Schofield

Andre,

I'm not sure what you meant by "trying to consistently match", but If 
you just want icc profiles for soft-proofing your printed output then 
that can be done.  Roy Harrington has a description of the method and 
the files needed for making the profiles on his QTR website:
http://www.harrington.com/QuadToneRIP.html

Carl
Show quoted textHide quoted text
On Friday, July 18, 2003, at 07:54  PM, Andre Vallejo wrote:

> As always,I'm trying to consistently match my mono prints 
> (MIS-UT-FSN,Epson 1160,matte and smooth pearl paper).
> So I wrote to a known professional profiler maker to see if I could 
> have one made for this combinations. I quote the answer:
>
> " Quad-tone ink sets require proprietary software code to be used 
> instead of the standard color ink set.  Standard color ICC profiles 
> are not useable with these ink sets because of the proprietary 
> software code.  The only place you can get profiles for quad-tone ink 
> sets is from the supplier of the specific ink set.  "
>
> I'm not sure I understand what the problem is...If one has the 
> spectrophotometer,the printed patch and the profiling software,what's 
> the problem?
>
> Best
>
> Andre Vallejo
> www.andrevallejo.net
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
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Re: Building profiles

2004-07-19 by Tyler Boley

A CMM uses ICC profiles to remap input color to the nearest printable
color the device/paper/ink can manage.
Quadtone profiles require density remapping for propper gradation, but
also assigning different tonal areas of the input to their apropriate
quad ink. This assumes a standard color driver without this
partitioning capability built in. The ICC approach and profiling
software has no way of knowing you want to send all your highlights to
a light gray ink that happens to reside in the yellow ink tank, then
smoothly transition to a darker ink that happpens to reside in the
magenta tank, etc...
This isn't to say you coudn't profile it, and even print through your
profile with possibly some success, but there will be no ink
partitioning to take advantage of using a quad inkset.
Color management, with the use of a profile, simply remaps color from
one defined space to another as closely as possible given the
characteristics of the two spaces.
Hope that makes sense.
Tyler

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Andre Vallejo"
<mastologia@p...> wrote:
> As always,I'm trying to consistently match my mono prints
(MIS-UT-FSN,Epson 1160,matte and smooth pearl paper). 
> So I wrote to a known professional profiler maker to see if I could
have one made for this combinations. I quote the answer:
> 
> " Quad-tone ink sets require proprietary software code to be used
instead of the standard color ink set.  Standard color ICC profiles
are not useable with these ink sets because of the proprietary
software code.  The only place you can get profiles for quad-tone ink
sets is from the supplier of the specific ink set.  "
> 
> I'm not sure I understand what the problem is...If one has the
spectrophotometer,the printed patch and the profiling software,what's
the problem?
Show quoted textHide quoted text
> 
> Best
> 
> Andre Vallejo
> www.andrevallejo.net
> 
> 
> [Non-text portions of this message have been removed]

RE: [Digital BW] Building profiles

2004-07-19 by Paul D. DeRocco

> From: Andre Vallejo [mailto:mastologia@...]
>
> As always,I'm trying to consistently match my mono prints
> (MIS-UT-FSN,Epson 1160,matte and smooth pearl paper).
> So I wrote to a known professional profiler maker to see if I
> could have one made for this combinations. I quote the answer:
>
> " Quad-tone ink sets require proprietary software code to be used
> instead of the standard color ink set.  Standard color ICC
> profiles are not useable with these ink sets because of the
> proprietary software code.  The only place you can get profiles
> for quad-tone ink sets is from the supplier of the specific ink set.  "
>
> I'm not sure I understand what the problem is...If one has the
> spectrophotometer,the printed patch and the profiling
> software,what's the problem?

The problem is that a quadtone (or hextone) inkset typically uses the
manufacturer's RGB driver, letting it believe that it is actually printing
in color. When printing color, there is only one combination of R, G and B
values that will translate into any particular color, but when printing with
quadtones, there may be many different combinations that yield the same
density of gray. Profiling software, which expects to operate on colors,
will be hopelessly confused by the many test patches which look like the
same color of gray.

--

Ciao,                   Paul D. DeRocco
Paul                    mailto:pderocco@...

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