QTR-Quadtone RIP

I want to optimize the dmax of a new paper. Can the users of
ColorMunki let me know if it's able to measure a 21-step test strip
for Dmax as so I can set the maximum ink limit.

TIA

Yes it works quit well.   It will give you LAB as well as Srgb.

 

You can go here and find some good information for creating QTR profiles as
well as a Grey scale target.

 

http://www.northlight-images.co.uk/article_pages/bw_printing/bw_print_colorm
unki.html

 

Paul

From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of John
Sent: Tuesday, July 01, 2008 10:33 AM
To: QuadtoneRIP@yahoogroups.com
Subject: [QuadtoneRIP] Can ColorMunki measure Dmax?

 

I want to optimize the dmax of a new paper. Can the users of
ColorMunki let me know if it's able to measure a 21-step test strip
for Dmax as so I can set the maximum ink limit.

TIA

 



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

I have read Keith's well written article but it's on linearization of
QTR profiles. I need to measure Dmax instead of LAB reading.

Thanks

--- In QuadtoneRIP@yahoogroups.com, "Paul Grant" <gphoto2@...> wrote:
>
> Yes it works quit well.   It will give you LAB as well as Srgb. 
> 
> You can go here and find some good information for creating QTR
profiles as
> well as a Grey scale target.
>  
>
http://www.northlight-images.co.uk/article_pages/bw_printing/bw_print_colorm

> unki.html
>  
> Paul

Maybe I'm didn't make it clear..... Say I want to know the max. ink
limit of each channel, I print a 21-step Dmax test strip (from 0 to
100) then measure each patches' Dmax e.g. let's assume it occurred at
65% for this example then I know the inking limit occurred at 65% for
that channel.

I did this with my previous spectro, as I'm thinking to get the
ColorMunki therefore need to know if it can do it.

Thanks

John,
 
Yes you are right it will not measure Dmax directly but I have used it to
find the MAX density........
 
Not sure if there is any correlation to LAB "L" value to density?
 
Paul

-----Original Message-----
From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of John
Sent: Tuesday, July 01, 2008 12:46 PM
To: QuadtoneRIP@yahoogroups.com
Subject: [QuadtoneRIP] Re: Can ColorMunki measure Dmax?



I have read Keith's well written article but it's on linearization of
QTR profiles. I need to measure Dmax instead of LAB reading.

Thanks

--- In QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com> yahoogroups.com,
"Paul Grant" <gphoto2@...> wrote:
>
> Yes it works quit well. It will give you LAB as well as Srgb. 
> 
> You can go here and find some good information for creating QTR
profiles as
> well as a Grey scale target.
> 
>
http://www.northlig
<http://www.northlight-images.co.uk/article_pages/bw_printing/bw_print_color
m> ht-images.co.uk/article_pages/bw_printing/bw_print_colorm
> unki.html
> 
> Paul



 



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

Hi,

Try this web site for conversions.

http://www.brucelindbloom.com/

Paul

--- In QuadtoneRIP@yahoogroups.com, "Paul Grant" <gphoto2@...> wrote:
>
> John,
>  
> Yes you are right it will not measure Dmax directly but I have used 
it to
> find the MAX density........
>  
> Not sure if there is any correlation to LAB "L" value to density?
>  
> Paul
> 
> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com 
[mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of John
> Sent: Tuesday, July 01, 2008 12:46 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Re: Can ColorMunki measure Dmax?
> 
> 
> 
> I have read Keith's well written article but it's on linearization 
of
> QTR profiles. I need to measure Dmax instead of LAB reading.
> 
> Thanks
> 
> --- In QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com> 
yahoogroups.com,
> "Paul Grant" <gphoto2@> wrote:
> >
> > Yes it works quit well. It will give you LAB as well as Srgb. 
> > 
> > You can go here and find some good information for creating QTR
> profiles as
> > well as a Grey scale target.
> > 
> >
> http://www.northlig
> <http://www.northlight-
images.co.uk/article_pages/bw_printing/bw_print_color

> m> ht-images.co.uk/article_pages/bw_printing/bw_print_colorm
> > unki.html
> > 
> > Paul
> 
> 
> 
>  
> 
> 
> 
> [Non-text portions of this message have been removed]
>

Yes, it will measure dmax.  Lmin=dmax in the scenario you described.   
You can easily convert L to density units with the appropriate formula  
(search the archive) if you wish, but it really isn't necessary.    
Colormunki will also strip read so you don't have to measure patch by  
patch, you just need to make a custom target to do this.  Send me an  
email if you want a Colormunki QTR compatible 51 step gray target psd  
file.

Carl

On Jul 1, 2008, at 4:07 PM, John wrote:

> Maybe I'm didn't make it clear..... Say I want to know the max. ink
> limit of each channel, I print a 21-step Dmax test strip (from 0 to
> 100) then measure each patches' Dmax e.g. let's assume it occurred at
> 65% for this example then I know the inking limit occurred at 65% for
> that channel.
>
> I did this with my previous spectro, as I'm thinking to get the
> ColorMunki therefore need to know if it can do it.
>
> Thanks

Hi Carl

I have sent you an email regarding this. As Yahoo Group hide all email
addresses, I did a search and sent it to your email address@schophoto,
I hope the address is correct.

Thanks
John

--- In QuadtoneRIP@yahoogroups.com, Carl Schofield <list@...> wrote:

>
> Yes, it will measure dmax.  Lmin=dmax in the scenario you described.   
> You can easily convert L to density units with the appropriate formula  
> (search the archive) if you wish, but it really isn't necessary.    
> Colormunki will also strip read so you don't have to measure patch by  
> patch, you just need to make a custom target to do this.  Send me an  
> email if you want a Colormunki QTR compatible 51 step gray target psd  
> file.
> 
> Carl
>

Thanks for the link.

John

--- In QuadtoneRIP@yahoogroups.com, "bwinkjet" <bwinkjet@...> wrote:

>
> Hi,
> 
> Try this web site for conversions.
> 
> http://www.brucelindbloom.com/
> 
> Paul
> 
> --- In QuadtoneRIP@yahoogroups.com, "Paul Grant" <gphoto2@> wrote:
> >
> > John,
> >  
> > Yes you are right it will not measure Dmax directly but I have used 
> it to
> > find the MAX density........
> >  
> > Not sure if there is any correlation to LAB "L" value to density?
> >  
> > Paul
> >

I uploaded the ColorMunki 51 step gray target to the Files>Tools section.  It is a CS3 psd 
file in rgb mode and should be printed with no color management.  Can be strip read with 
the ColorMunki using the ColorPicker module and export the data as a csv file.

Carl
--- In QuadtoneRIP@...m, "John" <firewoodtech@...> wrote:

>
> Hi Carl
> 
> I have sent you an email regarding this. As Yahoo Group hide all email
> addresses, I did a search and sent it to your email address@schophoto,
> I hope the address is correct.
> 
> Thanks
> John
> 
> --- In QuadtoneRIP@yahoogroups.com, Carl Schofield <list@> wrote:
> >
> > Yes, it will measure dmax.  Lmin=dmax in the scenario you described.   
> > You can easily convert L to density units with the appropriate formula  
> > (search the archive) if you wish, but it really isn't necessary.    
> > Colormunki will also strip read so you don't have to measure patch by  
> > patch, you just need to make a custom target to do this.  Send me an  
> > email if you want a Colormunki QTR compatible 51 step gray target psd  
> > file.
> > 
> > Carl
> >
>