Profil Fogra 27 et Profil Fogra 39

[duffman39]

Bonjour je voudrais savoir quel sont les difference entre le Profil Fogra 27 et Profil Fogra 39?
Et aussi ques ce que le Fogra enfin plutot que veulent dire ces 5 lettres.
Merci d'avance

[baron]

Le lien donné dans ton sujet précédent ne répond pas assez à tes questions ou est-ce que tu ne lis ni l'allemand ni l'anglais ?
http://www.fogra.org/products-en/icc39-40.html

Il s'agissait de faire parfaitement correspondre la norme ISO utilisée dans le processus de production (couleur des encres et du papier e.a.) et les spécifications théoriques données par les profils Fogra pour l'épreuvage.

The changes mainly affect the aim values for the CIELAB colour coordinates of the process colour solids and the two and three colour overprints. All other provisions in ISO 12647-2 remain untouched and valid.

Enhancement of the well proven offset ICC profile “ISO Coated”

The well proven previous offset profile “ISO Coated” has not been changed fundamentally but was optimized in some colour regions. For example the colour coordinates of the Cyan solid tone now better matches practical values. All normative CIELAB aim values for the ink primaries and the paper tint as defined by ISO 12647 have been incorporated with identical values into the FOGRA characterization data and the ECI offset profiles. Based on the informative aim values of the amendment, the CIELAB values for the secondary colours have been adjusted based on practical values derived from a large number of e.g. European printing tests. The new FOGRA characterization data sets and the ECI profiles have been carefully tested and are now ready for use in production. Substantial improvements of the new ECI offset profiles are closely related to the characterization data:
Identical aim values for the ink solids in the ISO standard and the characterization data: The CIELAB values in FOGRA39 perfectly match the respective values in ISO 12647-2:2004/ Amd 1 (2007). The unpleasant choice between “FOGRA” or “ISO” aim values finally belongs to the past.
Practice-oriented adjustment of the aim values for the secondaries green and blue based on a number of evaluated print runs. This applies in particular to the critical blue colour area (tendency to be more purple in print compared to the proof).
Practice-oriented reduction of the maximum ink coverage: Reducing the maximum ink coverage from 350% to 330%, or 300% respectively (setup value in profiling software), reflects the practical need of many printers, to avoid printing problems caused by too high ink coverage.
As before, details on how the profiles were created can be found in the relevant Info files.

http://www.eci.org/doku.php?id=en:colorstandards:offset

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Quant au nom Fogra, cette association s'appelait initialement la „Deutsche Gesellschaft zur Förderung der Forschung im graphischen Gewerbe“ (= société allemande pour la promotion de la recherche dans les arts graphiques). On peut imaginer que c'est de là que vient l'abréviation Fogra…