Dear List-members! I'm trying to compare input with output profiles as well as output with output profiles. These are all 4 channel CMYK profiles. Case 1 - Input with Output profile: Input profile: IsoCoated Euroscale ECI v2 Output profile: Ink-jet printer profile generated with Caldera (iPrism v8) Goal: the correct intersecting volume as calculated with viewgam -i Question: What rendering intent is the correct one for such a comparison (absolute RI?)? I want to know how much (in %) of the input profile is printable with the output profile. And should I use iccgamut with "-fb" or "-ff"? What and why is the correct setting. Case 2 - Output with Output profile: Output profile: Ink-jet printer profile generated with Caldera (iPrism v8) Output profile: Ink-jet printer profile generated with Caldera (iPrism v8) Goal: the correct intersecting volume as calculated with viewgam -i Question: What rendering intent is the correct one for such a comparison (absolute RI?)? I want to know how much (in %) of one profile is included in the other. And should I use iccgamut with "-fb" or "-ff"? What and why is the correct setting. Please point me in the right direction. Is there any paper, document, explanation about such undertakings? Thanks in advance, Georg Klima