I downloaded the 'altona_measure_1v1a.pdf' from www.eci.org, imported it
into Inkscape, exported it as PNG (1) and made a TIF with embedded color
profile (2) as well as a PDF/X-3 (3) out of it. I am going to get (1) -
(3) printed to compare. An empiric - to my taste somewhat astrologic -
approach that doesn't make me too happy.