[ECI-EN] ECI-RGB / Any advantages?

CONCERNING: ECI-RGB / Any advantages? At a recent meeting I heard that the application of the ECI RGB ICC profile would result in a better grey balance. I made a number of tests on this subject but did not find any proof for this statement. See test description and results below. Could anyone explain to me in which workflow it could be advantageous to use the ECI RGB ICC profile? Thanks for any comments! Best regards, Jo Brunenberg Senior technology consultant Prepress / ICT LOGIC USE BV member of Roto Smeets -------------------------------------------------- Test description - Test image: TC 2.88 (RGB target with colors covering complete RGB colorspace, including neutral greys, saturated and pastel colors etc. - I made the following versions of this file: 1. assigned sRGB 2. assigned Adobe RGB 3. assigned ECI RGB 4.assigned a scanner-RGB 5. converted to profile: sRGB 6. converted to profile Adobe RGB 7. converted to profile ECI RGB Next step: All 7 RGB-files were A) converted to profile (CMYK) with profile ECIwebcoatedsb.icc B) converted to profile (CMYK) with our custom web offset profile Next step: All files were proofed on IRIS A) with profile ECIwebcoatedsb.icc B) with our custom web offset profile Results: - No differences in grey balance between A and B - No differences in grey balance between all 7 versions on proof A and B - Only the following differences between A and B: - Some more color saturation in proof A - Some more shadow detail in proof A These last two observations can be explained by the fact that the ISO profile (printed on a sheet-fed press) has a larger color space compared to our custom profile. (printed on a web press).