Thank you for the tip, Martin! Is it a function of Argyllcms to create this "effect"? Could you briefly walk us through what you do? Best / Roger -----Original Message----- From: colorsync-users-bounces+graxx=videotron.ca@lists.apple.com [mailto:colorsync-users-bounces+graxx=videotron.ca@lists.apple.com] On Behalf Of Martin Orpen Sent: 29 février 2016 10:13 To: ColorSync <colorsync-users@lists.apple.com> Subject: Re: profile data manipulation On 27 Feb 2016, at 00:38, Dan Bergstrom <DanBergstrom@primarycolor.com> wrote:
Any experience out there in manipulating lab data for profiles? I’d sometimes like to force the profiling software (i1Profiler) to pick a different TAC than it’s default. I THINK it picks its TAC preferring minimum chroma and I want to allow I little more chroma and pick a lower L*. Or sometimes just force yellow under magenta in rich black of resulting profile.
I posted something a coupIe of months ago about overriding GRACoL profiles default behaviour as it is *impossible* to get rich blue blacks in a conventional ICC workflow nowadays. But you don’t need to manipulate the data. Download ArgyllCMS and make a device link profile using collink and its -G gamut mapping feature. Even if you keep the destination profile’s black curve, if your k max is 100 you’ll find that yellow is completely removed from the darkest blacks and from the blue axis too. And the extra chroma really stands out amongst those drab, ink starved, money saving print jobs that are the norm now :-) -- Martin Orpen Idea Digital Imaging Ltd