QTR-Quadtone RIP

>>Is there any benefit in re-creating custom curves for this new version? I
have just finished profiling two papers for QTR and wonder if they would be
a) compatible, b) have greater accuracy with this new version?

As I read in Roy's answer to my earlier question - there has been no change
to profiling. Its still 8 bit based. BUT he is interpolating between the 8
bit values to generate intermediate values to support 16bit.

To be honest paper coatings are barely consistent enough across the page to
let you profile at 7 bits (128 values) never mind more than 8 bits. So we
would be able to gain nothing from Roy directly increasing the curve
resolution beyond 8 bits.

You might ask what's the benefit of 16 bit printing ? Well I expect the main
benefit is in helping smooth tonal areas avoid posterization, by creating
more ink values in the tonal graduation.

I've been wrestling with this issue for the last few months and have been
experimenting with Cone style overlapping curves and QTR less overlapping
style. There is no doubt more overlap reduces the problem BUT also for some
papers overlapping curves reduces dmax. So as usual there is no free lunch.
I am excited about the potential of 16 bit printing to address this issue -
just got to Hackintosh my PC first :)

Mike

On 29 March 2010 15:50, dj_joy_uk <yahoo@...> wrote:

>
>
> --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>, "Roy"
> <roy@...> wrote:
> >
> > QuadToneRIP version 2.7.0 Release Notes
> >
> > !! Mac Users take NOTE !!
> >
> > Major Upgrades to the Mac version of QTR Software:
> > 8-bit and 16-bit image data supported -- from app to driver.
>
> I had already assumed that 16bit support was present in QTR, was this not
> the case?
>
> Is there any benefit in re-creating custom curves for this new version? I
> have just finished profiling two papers for QTR and wonder if they would be
> a) compatible, b) have greater accuracy with this new version?
>
> Thanks for your work on this Roy, great software.
>
>  
>


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