>
> Hi Daniel,
>
> 100% black should stay 100% black in the output. The most likely reasons for
> this not working correctly is the Rendering Intent and Black Point Compensation.
> In Photoshop it definitely has to be Perceptual Intent and BPC=On. Relative
> Colormetric often gives reduced dMax. On Mac's it's simply on the
> Print with Preview
> page. But if you use Convert-to-Profile check there as well. Default
> is often set
> at Relative. If you are on a PC and use other editing programs --
> Qimage in particular -
> it's important to see how it works.
>
> Ernst just mentioned some issues with Qimage so see that thread as well.
>
> Roy
>
>
> On 6/18/07, Daniel Jackson <dnj@...> wrote:
> > I'm trying to create a simple QTR curve. When I linearize it, I do
> > indeed get a much straighter luminance curve, but the dmax at
> > 100% drops dramatically: when plotted in Excel, the curve
> > noticeably tips upwards between 95 and 100, reducing the
> > dmax from 1.62 pre-linearization to 1.53 after.
> >
> > Why is this happening and how do I fix it?
> >
> > --Daniel
> > PS. Gray overlap is set to zero, so I don't think it's related to the
> > second ink curve being changed.
> >
> >
>