Re: Most gray patches for i1Profiler CMYK patch sets?
Re: Most gray patches for i1Profiler CMYK patch sets?
- Subject: Re: Most gray patches for i1Profiler CMYK patch sets?
- From: "email@hidden" <email@hidden>
- Date: Wed, 04 Apr 2018 13:09:59 -0400
I think this (how many patches to print) generally depends on a few things.
1. How many gray inks do you have.
2. How are these inks overlapped in the RIP (or driver).
3. How linear are the ink ramps to begin with: aka, how much work does the
profile have to do.
4. How “neutral” are your inks and how does the rip compensate for this. The
“color modules” in the epson driver compensate for the warm neutral semi-carbon
of the PK/MK, LK, and LLK inks.
5. All of the above will determine how NOISY your printer is in the neutrals:
aka, how much hue variance it has from one near neutral to the next near
neutral printed on a different part of the paper. This is also effected by
dither and resolution, etc.
It’s complicated.
In short, I’ve found anything over 600 near neutral patches (RGB profiling with
a neutralized K in the driver) is overkill and just gets your neutrals to be
worse. You would probably need to more and wider neutrals (for CMYK) if the K
is not a neutral ink or if your rip does not compensate for this internally.
Long story short: too many variables at play, each system is unique.
Best,
-Walker
> On Apr 4, 2018, at 12:50 PM, Terence Wyse <email@hidden> wrote:
>
> Hello all,
>
> Does anyone here know the “tipping point” for “color” vs gray patches in
> X-Rite i1Profiler? I’d like to find out what are all the different CMYK patch
> counts that optimize the number of neutral/near-neutral patches.
>
> There’s a list of these for RGB patch sets but nothing for CMYK patch sets
> that I’m aware of.
>
> Regards,
> Terry Wyse
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