Re: Printer profile mis-shape?
Re: Printer profile mis-shape?
- Subject: Re: Printer profile mis-shape?
- From: Kevin Muldoon <email@hidden>
- Date: Tue, 22 Aug 2006 17:05:27 -0400
You're on track!
As you know, the goal is to put as much ink down as possible without over-inking the media so we can maximize gamut. However, the sad fact is that the more ink we lay down, the more "touchy" and "unstable" our grey balance becomes.
The ONYX RIP manual has a great illustration on this subject. It was an old fashioned weight scale where the word 'grey balance' is on one side and the word 'gamut' on the other. I think It was a polite way to say that we can't have our cake and eat it too where color is concerned. If we get our hands dirty and create our own linerizations and ink limits manually then we have to make a choice between neutrality and gamut or make a compromise somewhere between the two.
If you're more concerned about neutrality, try cutting back your individual and total ink limits very dramatically and relinerize and re-profile. I think you'll find the the grey will behave a lot better and you'll be suprised to see how little color dynamics you lose especially. if you use perceptual rendering intent. I do not believe you will get a better result by manually adjusting neutrality at the linerization stage. Rather, concentrate on smoothness of ramp and avoid spikes or dramatic shifts in hue along the ramp. Actually, even hue shifts are permitted, but NOT TOO MUCH and I have no idea how to quantify 'not too much' using the written word.
Also bear in mind that slight drifts of 1 to 2 on the *a and *b channels are normal when the ramp enters into the highlight areas because the color of the inks are being overtaken by the color of the paper itself.
Good luck and stay in touch! Tell me how things work out.
A and B values are all over the place but the L values and density values are darn near perfectly linear. Wouldn't this mean the device is linear but not grey balanced?
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