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QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

Message

Re: Questions to Roy: 3800 UC Curves for Photo Rag 308 (long)

2007-05-03 by Leping Zha

Sorry again -- the higher Gamma profiles compress highlights not
shadows.  The QTR-GRAY-LAB/MATTE/PHOTO profiles deveotes more
bits to the shadows (than the Gray Gamma 2.2).

--- In QuadtoneRIP@yahoogroups.com, "Leping Zha" <leping@...> wrote:
>
> The real question to me now is, what's the advantage to use
> Roy's QTR-GRAY/RGB-MATTE/PHOTO profiles?
> 
> The QTR profiles came with a Gamma close to 2.5.  So when
> Photoshop convert the images, the dark shadows are compressed,
> potentially a source of banding for 8-bit files.

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