SV: Canned Epson Profiles and black point + linear GCR
SV: Canned Epson Profiles and black point + linear GCR
- Subject: SV: Canned Epson Profiles and black point + linear GCR
- From: Sören <email@hidden>
- Date: Sun, 25 Jul 2004 10:25:32 +0200
Simon,
This is my experiences...
Every profile I made for Epson inkjet printers with PM 4.5.1 had compressed
shadows, it always ended up I had to edit every single of them which I was
not happy about. You could easily see it when printing a neutral greyscale,
there was no separation above 90-95 %. I asked Gretag support why... but did
not get any respond, when upgraded to PM 5.0 it is much better comparing to
older prints made with PM 4.5.1 profiles. I have not been able to print
greyscale patches yet after the upgrade. I also recently find out trough
this list that an important future like "linear GCR" curve, to be able to
fully customize the curve in GCR is only available in MonacoProfiler... it
seem like I got the wrong software... another 3k - 4.5k US$ :(
Regards
Soren
I was wondering if the group could tell me how Epson arrives at the Lab
value for the black point of their canned profiles?
I have made a profile using i1, PM 4.5.1 on a dye based Epson printer
using Epson HW matt paper, NCA in the driver, printed same as source in
photoshop as usual. The measure Lab value of the black patch was 11.4,
0.3,-0.6
When I softproof ((Rel Col, BPC on) a file with detailed green foliage
in shadow I see a compression of the shadow info into the gamut of the
printer and a resulting loss of contrast and detail in these areas.
I was showing these out of gamut colors to a client, by using
Colorthink. I was interested in what the softproof using a canned
profile would be like and so loaded the canned profile into Colorthink
for comparison. I noted that the shape and volume of the profiles was
similar but that the black point for their profile was Lab 0,0,0.
I then looked at their other profiles in the set and they all had the
same black point, even their plain inkjet paper. I assume this is
contrived.
Does Epson automatically set their black point to 0,0,0 in all their
profiles and if so How?
The alarming thing is that the softproof (and print) looks much better
in terms of shadow detail and shadow tonal compression than the profile
I made, although my colour looks better elsewhere.
Any clues here?
Thanks
Simon
Simon Olding
email@hidden
(03) 6223 7882
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