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Re: Inkjet Proofer Separation Parameters

on 29/05/2002 14:43, Lee Blevins at email@hidden wrote:

> Black start could be one of those terms like GCR that gets defined
> differently depending on who is doing the definition.
>
> In one sense it could be where on the scale the black printer starts.
> For example, in the old days of scanner setups we might say the black
> starts at where the cyan is 50 percent. This would be a "skeleton" black
> by some definitions.
Yes I agree. To make it more confusing , is to add the fact that a lineal
image setter by definition can replace the grey component with fully
scalable increments by changing the size of the black dot size (cell).
Inkjets complicate this by adjusting not only the colorimetry but the
unlinear curves and perhaps 'colored' black throw new twists into the mix.
The black start then has to be shown as a relatively large (minimum dot) in
a FM pattern. So in any case if the black starts too early for most inkjet ,
photos of otherwise pretty girls will undoubtedly take on a not pretty five
o'clock shadow.
Luckily with the advent of the inkjets touting 4 picolitre drops or smaller
(next year expect 2pl!) this blends in be less noticeable.
The HP 10/20/50 and the Epson 10000 can use an early start which lessens
some of the problems of metamerism (so I'm told) and of course having a more
reliable grey scale.

Neil Snape email@hidden http://mapage.noos.fr/nsnape
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 >Re: Inkjet Proofer Separation Parameters (From: email@hidden (Lee Blevins))



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