[argyllcms] Re: Low ink limit & gamut mapping problem
- From: Bret Hesler <bhesler@xxxxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Fri, 26 Jun 2009 08:59:07 -0400
It is the ink limit that is causing the cavities in your dark gamut. If you
consider the Red Green and Blue points on the gamut, they are 100% of two
colors, totaling 200%, which is your ink limit. To get darker, especially in
a high GCR setup, the addition of black requires the reduction of the
primaries (10K 95C 95M, 20K 90C 90M, 50K 75C 75M, 100K 50C 50M all to
maintain the 200% ink limit)
Is the 200% ink limit necessary to avoid ink puddles or making the paper
wavy? I would suggest you find a setting in your driver that reduces the
individual ink output so you can use a higher ink limit, or just try a
higher ink limit with your current settings if you can.
Bret
On 6/25/09 2:19 PM, "Nikolay Pokhilchenko" <nikolay_po@xxxxxxx> wrote:
> Hello all!
>
> I have an inkjet printer with pigment inks. My aim is the printing on plain
> paper with the determined ink limit of 200 percent.
> The problem is in resulting print gamut: the gamut have three cavities on his
> low sides, so the Argyll gamut mapping algorithm warps the highly saturated
> gradients.
> Please, take a look at my *.ti3 attached. Wile both perceptual or relative
> mappings, the dark saturated areas gradients are highly jugged, right up to
> inversion of lightness on gradients.
> I have try the different black generations: "-kp 0 0.14 1 1 1.29 -l200 -L100"
> and "-kx -l200 -L100", but the gamut problem, of course, still persist. I've
> try the different profile quality settings - even "-qu", but while -qu mode
> the bands on gradients are more narrow but still unacceptable.
Other related posts:
