Re: CMYK simulation profile
Re: CMYK simulation profile
- Subject: Re: CMYK simulation profile
- From: Lee Badham <email@hidden>
- Date: Wed, 27 Nov 2002 09:33:36 +0000
on 27/11/2002 8:32 AM, Xabier Urien at email@hidden wrote:
>
Hello Barry...
>
The "Simulation" profile is only another step between the input and output
>
profiles.For Example, if you have sRGB like input, EuroScale like output and
>
your Epson Icc like simulation. Your RIP will conver your Image From sRGB to
>
Epson Icc, and after that to Euroscale. With this explanation want to show
No, the RIP will convert from sRGB to Euroscale to Epson Icc. You are using
the RIP as a simulation, and outputting to an Epson, so the last conversion
on the RIP has to be to Epson ICC.
>
you that the problem could be in different step. Becouse really you have a
>
convertion from RGB to CMYK and CMYK to CMYK. The Black generation (one of the
>
most habitual problems) is doing in the first convertion. Another think that
>
you should bear in main, is the ink limit int the simulaton profiles, becouse
You have to let the RIP perform a CMYK-CMYK profile to let the RIP generate
the correct colour for the Epson. In terms of Black Generation, The output
profile for the Epson controls how the black ink is put down. Provided that
has been done correctly - this will depend on which Epson you have, and the
number of inks - You should get decent prints.
>
is not the same put the limit in the simulation profile or in the final (I
>
recommend to put in the Output Icc).
Again the output profile for the Epson determins the ink limit. This will
always be different than any Press profile. There is no concept of 100% ink
coverage on an inkjet. Unlike a press, where 100% is defined as a solid ink
patch, an inkjet can always squirt more ink on the paper. So what is 100%?
How much ink is put on the paper to get 100% is entirely defined by the RIP.
That is why you cannot move profiles from one type of RIP to another, even
though you may be using the same printer paper etc. The BEST RIP, for
example, as part of the linearisation, defines the total ink. This means
that all profiles can be generated to 400% Total ink, with a 100% black.
Regards
Lee Badham
Bodoni Systems Ltd - Key solutions in digital imaging.
Tel: 01895 825776
Fax: 01895 825994
email: email@hidden
web:
http://www.bodoni.co.uk
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