QTR-Quadtone RIP

The documentation indicates that I can use an acv curve from
Photoshop, but I haven't a good idea how to do this... and the
documentation is simply not at all clear. Do I just build an arbitrary
grayscale (i.e. single-channel) curve, then save it and import the
file?  Or do I use a curve with 4 channels (e.g. quadtone curveset)?

I'm just getting started with B/W printing, and QTR seems so far to
work much much better than the kluged ultratone curves that would be
used under Photoshop.

Thanks in advance for any help.
DRK

David

The curve must be a single channel curve (i.e. from a grayscale file or
single channel). In my experience the impact of an acv curve when applied to
a QTR curve makes most sense when the display of the acv curve in PS is set
up so that 0 density is on the bottom left of the PS curve display and 255
(max) density is on the top right. That way lowering the acv curve has the
same effect on the QTR curve.

Tom Moore

> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of davidkeasey
> Sent: Thursday, November 03, 2005 8:05 AM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Dumb Newbie question.... importing acv curves from
> photoshop...
> 
> The documentation indicates that I can use an acv curve from
> Photoshop, but I haven't a good idea how to do this... and the
> documentation is simply not at all clear. Do I just build an arbitrary
> grayscale (i.e. single-channel) curve, then save it and import the
> file?  Or do I use a curve with 4 channels (e.g. quadtone curveset)?
> 
> I'm just getting started with B/W printing, and QTR seems so far to
> work much much better than the kluged ultratone curves that would be
> used under Photoshop.
> 
> Thanks in advance for any help.
> DRK

Tom:  

Many thanks for the quick reply and the tips on how to make it 
easier.  QTR is sooo much easier to use than the non-intuitive RGB 
curves for printing through photoshop .

DRK


--- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@r...> 
wrote:
>
> David
> 
> The curve must be a single channel curve (i.e. from a grayscale 
file or
> single channel). In my experience the impact of an acv curve when 
applied to
> a QTR curve makes most sense when the display of the acv curve in 
PS is set
> up so that 0 density is on the bottom left of the PS curve display 
and 255
> (max) density is on the top right. That way lowering the acv curve 
has the
> same effect on the QTR curve.
> 
> Tom Moore
> 
> > -----Original Message-----
> > From: QuadtoneRIP@yahoogroups.com 
[mailto:QuadtoneRIP@yahoogroups.com] On
> > Behalf Of davidkeasey
> > Sent: Thursday, November 03, 2005 8:05 AM
> > To: QuadtoneRIP@yahoogroups.com
> > Subject: [QuadtoneRIP] Dumb Newbie question.... importing acv 
curves from
> > photoshop...
> > 
> > The documentation indicates that I can use an acv curve from
> > Photoshop, but I haven't a good idea how to do this... and the
> > documentation is simply not at all clear. Do I just build an 
arbitrary
> > grayscale (i.e. single-channel) curve, then save it and import the
> > file?  Or do I use a curve with 4 channels (e.g. quadtone 
curveset)?
> > 
> > I'm just getting started with B/W printing, and QTR seems so far 
to
> > work much much better than the kluged ultratone curves that would 
be

> > used under Photoshop.
> > 
> > Thanks in advance for any help.
> > DRK
>