Re: Epson canned profiles
Re: Epson canned profiles
- Subject: Re: Epson canned profiles
- From: Iliah Borg <email@hidden>
- Date: Mon, 16 Apr 2018 16:46:26 -0400
The interaction between a profile and the printer hardware is a complex one.
Sometimes in economy mode a printer will not put more ink, whatever a profile
attempts, and in some profiling engines a profile striving for density may
sacrifice shadow neutrality.
Profiling for economy mode (and I tired it, so speaking from experience; I use
Epsons for many years) results in no deep shadow improvements, but can easily
make things worse for Zones III & IV.
On Apr 16, 2018, at 4:29 PM, ben wrote:
> On Apr 16, 2018, at 12:59 PM, Andrew Rodney <email@hidden> wrote:
>
>> On Apr 16, 2018, at 12:03 PM, ben <email@hidden
>> <mailto:email@hidden>> wrote:
>>
>>> What, exactly, in D50 L*a*b*, is the darkest color the printer generates
>>> with the most economical setting? And what does it generate with the
>>> highest quality setting?
>>
>> According to BableColor CT&A it's dE 2000 of 0.85 and here are the two
>> measurement values from patch 03 (451), RGB 0/0/0.
>> Lab values extracted from BabelColor PatchTool 6.0 (yup, new version; neat!):
>>
>> 7.2000 1.1600 4.5100
>>
>> 6.2000 1.1800 4.1600
>
> FINALLY! Thank you!
>
> (Was that _really_ so difficult?)
>
> So first...those are quite impressive numbers. Kudos to Epson.
>
> It seems like they're saving some ink, but not much, in the economy mode. I'd
> be curious to compare total volumetric ink usage (and thus cost-per-print)
> between the two -- but that's a topic for a different discussion.
>
> From L* 7.2 to 6.2 is enough of a difference that it'll matter in a critical
> setting, but not enough to matter for the overwhelming majority of "good
> enough" prints -- which was exactly what I was describing as the most
> plausible explanation I could come up with consistent with your claims.
>
> I think, were I tasked with crafting a single profile for both, I'd throw
> everything at the high quality mode, on the assumption that those for whom it
> most matters would appreciate that most, and those for whom "good enough" is
> good enough won't notice the difference between an average of the two and one
> targeted to the spare-no-expenses mode. The end user would perceive it as
> maximal shadow clarity and density in expensive mode and a very little
> comparative muddiness in ink-saving mode. With a profile made from an average
> of the values, the two modes will look very much like each other, but you're
> leaving some quality on the table for the expensive mode.
>
> The next point that comes to mind is that it's not all that far off the
> neutral axis -- measurably warm, but not so warm that many would notice. But
> that _does_ offer the hope that the darkest the printer can get and stay on
> the neutral axis is still awfully dark. Which would make a lot of the hype
> justifiable. A lot depends on the shape of the bottom of the gamut, but just
> getting those two trivial numbers out of you was so much trouble I wouldn't
> even dream of asking for anything more complicated....
>
> Cheers,
>
> b&
> _______________________________________________
--
Best regards,
Iliah Borg
LibRaw, LLC
www.libraw.org
www.rawdigger.com
www.fastrawviewer.com
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