The created RGB target can be printed through QTR as well, it will act as a greyscale. At least that is what I recall.
Met vriendelijke groet, Ernst
Dinkla Grafische Techniek
Quad, piëzografie, giclée
www.pigment-print.com
For conversion you could assign AdobeRGB to the RGB target when loading in PhotoShop and convert to Greyscale with Gamma 2.2, then save without a profile attached. Both spaces have Gamma 2.2. In theory Photoshop does not interfere then, it would surprise me when the numbers change with that method.
Met vriendelijke groet, Ernst
Dinkla Grafische Techniek
Quad, piëzografie, giclée
www.pigment-print.com
On Tue, Feb 3, 2015 at 6:04 AM, jeff.grant@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
Thanks Richard. I used CMYK in ColorPort originally.
It's probably my lack of understanding but, once I convert to GG in PS, the histogram readout is not linear.Using your data, for K, I get 100,99,97,95 etc. I expected to see the numbers that I had entered. The RGB is similar, it goes 0,1,1,3 for L.