QTR-Quadtone RIP

Trying to solve a problem for a student...

Is there a way to adjust the color of any given "Warm" QTR setting to be more warm, 
espcially more rust/red in hue?

thanks

Darryl Baird

Darryl,

Most qtr warm profiles are pure black and light black.
To get a warmer profile you would have to make a new
profile using other inks to provide the tone you are
looking for. Look at one of the sepia profiles as a
starting point.

Guy

--- Darryl Baird <dgbaird@...> wrote:

> Trying to solve a problem for a student...
> 
> Is there a way to adjust the color of any given
> "Warm" QTR setting to be more warm, 
> espcially more rust/red in hue?
> 
> thanks
> 
> Darryl Baird
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
>     QuadtoneRIP-unsubscribe@yahoogroups.com
> 
>  
> 
> 
> 
> 


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Darryl

You don't state what printer/paper/ink, but assuming it's a UC curve, most
curves sets have a sepia curve. You could try that or try blending it with
the warm or cool curves.

A slightly more complicated approach would be to create a new curve by
modifying a warm or sepia curve by adding a small amount of LM ink (or
simply increasing it in the case of most sepia curves). A simple way to do
that is to use the Copy Curve From setting for the LM curve to copy the
curve from the LK curve. Then set the limit for the LM low so there is only
a small amount of LM added in proportion to the LK.

Looking at an existing sepia curve will show you how the Copy Curve feature
is used.

If the amount of LM needed to create your desired effect is small, you might
have acceptable results without needing to re-linearize the curve. You could
also make a small adjustment the shadows or gamma in QTR to compensate for
the additional ink.

Tom Moore



> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of Darryl Baird
> Sent: Tuesday, April 11, 2006 1:23 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] warmer than "warm"
> 
> Trying to solve a problem for a student...
> 
> Is there a way to adjust the color of any given "Warm" QTR setting to be
> more warm,
> espcially more rust/red in hue?
> 
> thanks

...

Thanks for the help so far, we're printing on a 2200, with UC inks.

I've not ventured into the QTR curves as yet, so I've have to go there before I know what I 
don't know. ;-)

Darryl

--- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@...> wrote:

>
> Darryl
> 
> You don't state what printer/paper/ink, but assuming it's a UC curve, most
> curves sets have a sepia curve. You could try that or try blending it with
> the warm or cool curves.
> 
> A slightly more complicated approach would be to create a new curve by
> modifying a warm or sepia curve by adding a small amount of LM ink (or
> simply increasing it in the case of most sepia curves). A simple way to do
> that is to use the Copy Curve From setting for the LM curve to copy the
> curve from the LK curve. Then set the limit for the LM low so there is only
> a small amount of LM added in proportion to the LK.
> 
> Looking at an existing sepia curve will show you how the Copy Curve feature
> is used.
> 
> If the amount of LM needed to create your desired effect is small, you might
> have acceptable results without needing to re-linearize the curve. You could
> also make a small adjustment the shadows or gamma in QTR to compensate for
> the additional ink.
> 
> Tom Moore
> 
> 
> 
> > -----Original Message-----
> > From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> > Behalf Of Darryl Baird
> > Sent: Tuesday, April 11, 2006 1:23 PM
> > To: QuadtoneRIP@yahoogroups.com
> > Subject: [QuadtoneRIP] warmer than "warm"
> > 
> > Trying to solve a problem for a student...
> > 
> > Is there a way to adjust the color of any given "Warm" QTR setting to be
> > more warm,
> > espcially more rust/red in hue?
> > 
> > thanks
> 
> ...
>

Darryl

Before you get into the complexity (not that complex, really) of the Curve
Creator, if you haven't done so already, I recommend you try the sepia
curve, either alone or blended with another curve (warm or cool). That may
accomplish what you want.

Tom Moore

> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of Darryl Baird
> Sent: Tuesday, April 11, 2006 4:07 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Re: warmer than "warm"
> 
> Thanks for the help so far, we're printing on a 2200, with UC inks.
> 
> I've not ventured into the QTR curves as yet, so I've have to go there
> before I know what I
> don't know. ;-)

Going there, you will quickly discover what you don't know, and thereby
learn what you need to know :-) !

> 
> Darryl
...