Yahoo Groups archive

QTR-Quadtone RIP

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

Thread

Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

2007-02-05 by Daniel

i've completed the ink partitioning and created the quad curve file. 

now i'm ready for the correction curve process. 

per QTR's Eye-One-ReadMe.pdf (pg. 4) it instructs creating the quad curve and print the 
Step-21-gray stepwedge. but before i print the Step-21-gray stepwedge to create a 
correction curve, am i suppose to follow the printing procedure described on page 6 of 
Tutorial.pdf -- that is selecting Let Photoshop Determine Colors, QTR-Gray Matte Paper, 
Rendering, and Black Point Compensation before printing Step-21-gray stepwedge? if not, 
then should it be No Color Management or Printer Manages Color?

a bit confused here.

your help is appreciated.

thanks.

daniel

QTR 2.4.3
Mac OS X

Re: Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

2007-02-06 by Daniel

anyone knows?

i've printed the step-21-random.tif using two different settings: one Printer Manages 
Colors, and the other No Color Management. i did measurements on both and the 
measurements between them are very different.

does anyone knows which setting should be used - Printer Manages Colors  or No Color 
Management.

anyone?


--- In QuadtoneRIP@yahoogroups.com, "Daniel" <dc1961@...> wrote:
>
> i've completed the ink partitioning and created the quad curve file. 
> 
> now i'm ready for the correction curve process. 
> 
> per QTR's Eye-One-ReadMe.pdf (pg. 4) it instructs creating the quad curve and print the 
> Step-21-gray stepwedge. but before i print the Step-21-gray stepwedge to create a 
> correction curve, am i suppose to follow the printing procedure described on page 6 of 
> Tutorial.pdf -- that is selecting Let Photoshop Determine Colors, QTR-Gray Matte Paper, 
> Rendering, and Black Point Compensation before printing Step-21-gray stepwedge? if 
not, 
Show quoted textHide quoted text
> then should it be No Color Management or Printer Manages Color?
> 
> a bit confused here.
> 
> your help is appreciated.
> 
> thanks.
> 
> daniel
> 
> QTR 2.4.3
> Mac OS X
>

Re: Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

2007-02-06 by Daniel

ok, i think i'm holding a dialogue with myself here. 

anyway, i think i've found the answer here:
http://f1.grp.yahoofs.com/v1/MO_HRYdibvrk37Mh-PaKrONbBpf67BYP-kHS630pr-
JDMo2Zn_KoyYnmU9JyOifFlrLn01cjzOrGxcUKLKdS4qIjUZ8fz10U/Docs/ICC%20Info.txt

but it'd be nice to hear from someone regarding this question because i want to make sure  
that i'm on the right track. that is, i don't end up double profiling, otherwise all this 
effort to linearize and create an ICC profile would be pointless. don't you think?

it seems logical that the target shouldn't be color managed in order that my correction 
curve can be derived from this target correctly. therefore this is the step i have to get right 
before i can continue to creating an accurate ICC profile. if my correction curve is good, to 
create my ICC profile, i again print my target without color management, but using the 
corrected curve. i measure the target, and using the data file created by Measure Tool i 
use QTR-Create-ICC to generate my ICC profile. Finally, then, i'd print letting photoshop 
color manage, using perceptual for rendering intent, black point compensation, and the 
newly generated profile.

am i on the right track?

can someone confirm, please?

anyone out there?

thanks again.

daniel

--- In QuadtoneRIP@yahoogroups.com, "Daniel" <dc1961@...> wrote:
>
> anyone knows?
> 
> i've printed the step-21-random.tif using two different settings: one Printer Manages 
> Colors, and the other No Color Management. i did measurements on both and the 
> measurements between them are very different.
> 
> does anyone knows which setting should be used - Printer Manages Colors  or No Color 
> Management.
> 
> anyone?
> 
> 
> --- In QuadtoneRIP@yahoogroups.com, "Daniel" <dc1961@> wrote:
> >
> > i've completed the ink partitioning and created the quad curve file. 
> > 
> > now i'm ready for the correction curve process. 
> > 
> > per QTR's Eye-One-ReadMe.pdf (pg. 4) it instructs creating the quad curve and print 
the 
> > Step-21-gray stepwedge. but before i print the Step-21-gray stepwedge to create a 
> > correction curve, am i suppose to follow the printing procedure described on page 6 
of 
> > Tutorial.pdf -- that is selecting Let Photoshop Determine Colors, QTR-Gray Matte 
Paper, 
Show quoted textHide quoted text
> > Rendering, and Black Point Compensation before printing Step-21-gray stepwedge? if 
> not, 
> > then should it be No Color Management or Printer Manages Color?
> > 
> > a bit confused here.
> > 
> > your help is appreciated.
> > 
> > thanks.
> > 
> > daniel
> > 
> > QTR 2.4.3
> > Mac OS X
> >
>

Re: [QuadtoneRIP] Re: Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

2007-02-06 by Carl Schofield

On Feb 5, 2007, at 11:17 PM, Daniel wrote:

> ok, i think i'm holding a dialogue with myself here.
>
> anyway, i think i've found the answer here:
> http://f1.grp.yahoofs.com/v1/MO_HRYdibvrk37Mh-PaKrONbBpf67BYP- 
> kHS630pr-
> JDMo2Zn_KoyYnmU9JyOifFlrLn01cjzOrGxcUKLKdS4qIjUZ8fz10U/Docs/ICC% 
> 20Info.txt
>
> but it'd be nice to hear from someone regarding this question  
> because i want to make sure
> that i'm on the right track. that is, i don't end up double  
> profiling, otherwise all this
> effort to linearize and create an ICC profile would be pointless.  
> don't you think?
>
> it seems logical that the target shouldn't be color managed in  
> order that my correction
> curve can be derived from this target correctly. therefore this is  
> the step i have to get right
> before i can continue to creating an accurate ICC profile. if my  
> correction curve is good, to
> create my ICC profile, i again print my target without color  
> management, but using the
> corrected curve. i measure the target, and using the data file  
> created by Measure Tool i
> use QTR-Create-ICC to generate my ICC profile. Finally, then, i'd  
> print letting photoshop
> color manage, using perceptual for rendering intent, black point  
> compensation, and the
> newly generated profile.
>
> am i on the right track?

Yes, your procedure as outlined above is correct.
Show quoted textHide quoted text
>
> can someone confirm, please?
>
> anyone out there?
>
> thanks again.
>
> daniel
>
> --- In QuadtoneRIP@yahoogroups.com, "Daniel" <dc1961@...> wrote:
>>
>> anyone knows?
>>
>> i've printed the step-21-random.tif using two different settings:  
>> one Printer Manages
>> Colors, and the other No Color Management. i did measurements on  
>> both and the
>> measurements between them are very different.
>>
>> does anyone knows which setting should be used - Printer Manages  
>> Colors  or No Color
>> Management.
>>
>> anyone?
>>
>>
>> --- In QuadtoneRIP@yahoogroups.com, "Daniel" <dc1961@> wrote:
>>>
>>> i've completed the ink partitioning and created the quad curve file.
>>>
>>> now i'm ready for the correction curve process.
>>>
>>> per QTR's Eye-One-ReadMe.pdf (pg. 4) it instructs creating the  
>>> quad curve and print
> the
>>> Step-21-gray stepwedge. but before i print the Step-21-gray  
>>> stepwedge to create a
>>> correction curve, am i suppose to follow the printing procedure  
>>> described on page 6
> of
>>> Tutorial.pdf -- that is selecting Let Photoshop Determine Colors,  
>>> QTR-Gray Matte
> Paper,
>>> Rendering, and Black Point Compensation before printing Step-21- 
>>> gray stepwedge? if
>> not,
>>> then should it be No Color Management or Printer Manages Color?
>>>
>>> a bit confused here.
>>>
>>> your help is appreciated.
>>>
>>> thanks.
>>>
>>> daniel
>>>
>>> QTR 2.4.3
>>> Mac OS X
>>>

Re: Linearizing a QTR Curve using Step-21-gray stepwedge: pre-printer setup question

2007-02-06 by Daniel

thank you carl. 

i think i must have gone through about 200 sheets of inkjet paper, and i really appreciate the 
confirmation. 

thanks.

daniel



--- In QuadtoneRIP@yahoogroups.com, Carl Schofield <list@...> wrote:
Show quoted textHide quoted text
>
> 
> On Feb 5, 2007, at 11:17 PM, Daniel wrote:
> >
> > am i on the right track?
> 
> Yes, your procedure as outlined above is correct.

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.