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Re: Euro-standards?

If it's for offset printing, a great start is Photoshop's own "Europe
Prepress Defaults" settings. It's Eurostandard profiles are built from ISO
12647-2 compliant press runs, that means they have the colorimetry and dot
gain specified in that standard.
While "Eurostandard" was never a published set of parameters such as SWOP
was, ISO 12647-2 is very much in the ballpark of what European printers use.

The main difference is between negative-plate and positive-plate workflow.
In the US negative is more common, and that means there is a dot % gain in
the film-to-plate transfer. Added to the press and optical gains, the total
dot gain amounts to something between 20 and 24% usually.
In Europe, positive is more common, and that means there is a dot % loss in
the film-to-plate transfer. Thus, that loss added to the press and optical
gain, amounts to dot gain numbers about 4 % lower than the U.S. ones.

You can see that easily in Photoshop: if you open a file that is separated
under SWOP, and you assign a Eurostandard profile to it (as opposed to doing
a profile-to-profile conversion), you'll see it as washed out. That is a
consequence of the lower total dot gain represented in the profile.

ISO-12647, by the way, aims to be an international standard, not just a
European one. It makes provisions for both positive and negative workflows,
so it does accommodate U.S. printers too. It's just a matter of pushing it
hard enough, by diffusion and education and some marketing.

-- Roberto Michelena
EOS S.A.
Lima, Peru
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