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Re: [QuadtoneRIP] Re: Moiré?

2015-12-02 by Roy Harrington

Stefan,

Can't give you any real answer. But yes the dithering is different on each channel.
They are all designed to avoid patterns and moire.

Roy

On Wed, Dec 2, 2015 at 6:14 AM, stefanchristiansen@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:


In response to a private answer:

Thanks for the suggestion.
I wish it was newton rings, I could solve it.
But those artefacts have a chevron-patterned aspect and can be observed on a light table.

I tested different channels combinations (same ink dilution in each), and it really looks like cutting down LC and LM (and rising other channels) makes great improvements, campaigning for a sort of conflict between X and LX channels if used equally.
This might not sound that much related to QTR, but I remember a discussion where it was stated that QTR uses its own dithering algorithms and that every channel has its own dithering placement of drops, contradicting a moiré possibility.
I hoped to get a deeper understanding of eventual dithering patterns interactions.

Moving on anyway…

Stefan Christiansen





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