Re: Epson Enhanced Matte
Re: Epson Enhanced Matte
- Subject: Re: Epson Enhanced Matte
- From: Ernst Dinkla via colorsync-users <email@hidden>
- Date: Wed, 19 Jun 2019 11:01:45 +0200
Roger,
M0. Tungsten light source that does not go deep into UV. i1Share spectral
measurements and the Lab data taken from that app too.
380 to 730 NM readings. With an archive manager you can open SpectrumViz
and get to the Data files.
The goal of SpectrumViz was identifying whether there were OBAs used in the
papers and where in the paper structure. On the web page is an explanation
which conclusions can be made of the results. I think the app contributed
to the reduced use of OBAs in inkjet art papers and to the use of better
normal whitening agents (high L with a smooth continuous spectral plot) and
in some cases to better fluorescent brightening agents (on longevity) in
said papers. Meanwhile with improved pigment inkjet inks the main
fading/color constancy issues are in the substrates printed on.
Aardenburg-Imaging.com has excellent longevity testing done for the same
purpose. On inkjet inks and the paper whites where Wilhelm-Research has not
contributed much on the last aspect. AFAIK you will find paper white
measurements there done more according your methodology. Look in the test
result PDFs. Interesting observation on OBA/TiO2 containing paper and paper
white color shifts due to dark storage there too. That next to articles on
gas fading and light induced fading.
Sometimes manufacturers react in another way on bad fade test reports: Your
Enhanced Matte Paper was originally called Archival Matte Paper. But
yellowed terribly over time. The name changed several years ago. Ultra
Premium Presentation Paper Matte, is the cut sheet version of Enhanced
Matte Paper.
it is not my territory in the graphic arts but this (new) emphasis on
matching proofing papers with OBA containing production stock is ignoring
the fact that the consumer viewing conditions are as uncertain as they used
to be in the past. This type of profiling becomes almost an academic effort
and probably stimulates the use of OBAs which will only result in less
color constancy in the real world. i thought it had a purpose for outdoor
applications but even there I see some practical issues. I know as long as
it satisfies the customer, ISO standards etc ............
Met vriendelijke groet, Ernst Dinkla
Dinkla Grafische Techniek
Quad, piëzografie, giclée
www.pigment-print.com
On Wed, Jun 19, 2019 at 1:28 AM Roger Breton via colorsync-users <
email@hidden> wrote:
> Found the Lab data for the Enhanced Matte 190!
> Had to leave the mouse over the media name, for the yellow "tab"
> information to appear.
> But... only CIE Lab 96.03 0.6 -2.1?
>
> I guess the instrument used to make the measurement, an X-Rite Eye One
> Basic, means that this is an "M0" or "Unfiltered UV" or "Legacy"
> measurement. So, using an M1 instrument, the b* value would a little more
> "negative". But by how much?
>
> The Doubleweight Matte 160 is CIE Lab 93.3 1.9 -4.4, a little "better" for
> my purpose, despite the lower ISO Brightness number? If I'm to stick with
> Epson, my "best" bet is with Presentation Matte 172, at CIE Lab 94.6 2.2
> -5.8.
>
> Best / Roger
>
> -----Original Message-----
> From: Martin Orpen <email@hidden>
> Sent: Tuesday, June 18, 2019 5:50 PM
> To: email@hidden
> Cc: 'colorsync-users?lists.apple.com' List <
> email@hidden>
> Subject: Re: Epson Enhanced Matte
>
>
> > On 18 Jun 2019, at 21:57, Roger Breton via colorsync-users <
> email@hidden> wrote:
> >
> > Hate to ask but would anyone have “real” CIE Lab measurements
> (farbmessung) for this paper? Thanks for your patience and help.
>
>
> Roger
>
> Ernst Dinkla’s SpectrumViz has measurements for loads of inkjet papers:
>
> <http://www.pigment-print.com/spectralplots/spectrumviz_1.htm>
>
> Requires JRE to run.
>
> Cheers
>
> --
> Martin Orpen
> Idea Digital Imaging Ltd
>
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