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QTR-Quadtone RIP

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Re: Issue creating R800 profile using gloss optimizer

2007-12-13 by Olivier

> Using a text editor, I opened the .quad file that the curve 
creation 
> tool output, and I looked at the gloss optimizer section.  Lo and 
> behold, the first value in that section is zero. I manually changed 
> it to be equal to the second value... and voila, I get full 
coverage 
> of gloss optimizer on the pure-white areas of the page!
> 
> Incidentally, this isn't a perfect solution, because now the entire 
> white space on the page gets a 30% coat of glop... not just the 
> white space within the image boundaries.  Fine for an 8x10, not so 
> economical when printing a smaller image.
> 
> So it looks like this is just a minor bug in the curve creation 
tool.
> 

I'm soon on for Piezo MPS with the infamous GLOP.
I think I understand was is said here, yet not completely. I open 
R800_F-A-Pearl_2880_warm_glop_v10.quad in text, couple of questions :

1. Quad txt shows for an ink position (say PK) a 0-255 scale. I 
assume this is ink value not RVB value so that 0 is no ink 255 is 
full ink (would make sense for a rip) ?
2. Out-value seems to be 16b (0-65536) ? PK in the above quad reaches 
below 65536 for TIL purpose most likely.
3. My understanding is that there's still an issue for all white 
areas get a spray of GLOP, not much convenient. The idea of applying 
a PS curve to limit the image range to 0-254 is the only work-around ?

Thanks for helping...and possibly saving me time and consumable cost.
Olivier

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