QTR-Quadtone RIP

chiaro2112 wrote:

> Thanks For your detail Explanation, its very helpful info for me to find good starting point. 
> I just experiment with epson ABW setting in my Epson Premium Glossy Paper and Ilford 
> Smooth Pearl Paper. It seems difficult to find Linear result with ABW setting (from Light to 
> darkest setting) in Epson Premium Glossy Paper. It always introduce Banding in Highlight 
> area but the Dmax doesn't run back on the 100% patch . I believe Im already choosed the 
> proper media setting for that. From 21 & 51 gray Target that i Printed out I see Obvious 
> Color Shift in 25%( from 21 gray Target) & 24-28% (from 51 gray target).Before 25% and 
> Toward 100% the patch are acceptable neutral. There is any Possibility to correct this 
> (Color Shift) in Epson ABW setting?

Sorry, I am not that familiar with the Epson ABW driver. 
There must be a manual for the right settings (CM included) 
and what media preset to use for the paper. The Epson ABW 
still uses color in its ABW mode so shifts are possible I guess.

> Its very strange because it more easier to find Linear result with my Ilford Smooth pearl 
> paper with Epson Semi Gloss setting and ABW dark setting. I think you're right about 
> epson COLOR Base and maybe my printer behave differently than it used to be. Im already 
> try download it but im just successfully got the Win XP version, The website (epson UK) 
> didn't respond when i tried to choose Mac Os Version.


> When you mention about Correction Curve in PS, are you mean Curve Adjustment layer or 
> custom curve in dot gain setting?

Any choice I think. Just making a curve and save it for a 
conversion. Or an action with a curve. You apply it before 
printing but you don't save it with the file as there will 
be another printer or method in the future.

> Oh ya, i use Epson 4800 and it has color density setting is it same with ink limit feature in 
> your hp driver?

Don't think so, the color density setting will be more of a 
gamma shift that influences the mid tones heavier. The 
inklimit in the HP Z3100 is not in the driver but in a 
separate utility where you can make custom media presets 
based on existing ones to use in the driver. Drying time, 
paper thickness, ink limitation 100%-80% (it actually 
reduces the ink amount lineary),  and when made it will 
calibrate that media preset/paper immediately and if desired 
make a custom (color) profile after that. In the driver 
itself there are density settings like in Epson's ABW.

-- 
Met vriendelijke groeten, Ernst


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