Re: Sprintscan 120 issues/findings (comments welcomed)

["Dave King" <kingphoto@xxxxxxxxxxxxxx>]

> ----- Original Message -----
> From: "Don Dement" <don.dement@verizon.net>
> > I've read that some printers use only black ink below about
> this value,
> > and color above.
> >
> > Could this be something that Nikon has set deliberately,
> anticipating
> > printing without black or is that stretching an observation too
> far?

----- Original Message -----
From: "Ernst Dinkla" <E.Dinkla@chello.nl>
> Epson printers do indeed print only black ink with their normal
> drivers. As most modern printing processes do. The point where
> UCR or GCR eliminates composite grey and where ink layed down
> becomes black only, varies between  15 and 25 RGB. Printer type
> and paper settings dependent. Above 15 to 25 RGB there's still
> black used it will be cut out halfway approx: 125 RGB. The last
> depends more on the droplet size of the printer used. The finer
> the droplet the longer the range of the black. With RIP's the
> control of black generaton is given to the ink limit setting +
> custom profiles.
>
> Sometimes you will observe a better black above 15 or 15 RGB
> where there's still some composite grey with the black. Depends
> on the absorbtion of the paper, sometimes black only isn't enough
> ink.
>
> I do not see any advantage of having no information in your file
> below 23 RGB. Not in relation to the behaviour of the Epson's
> printer driver nor to any other printing process nor to any other
> display medium. I have used the method to scan a negative as
> positive and do the reversal in Nikonscan to get the information
> below 25 RGB. It prints a lot better on an Epson 9000 + Epson
> driver with a custom profile. Made all the difference on a print
> with shadows between the roots of a tree.
>
> Ernst

Most interesting Ernst.  I've only scanned a few color negs with the 8000 so
far, but my impression was neg scans come in to the preview a bit "soft"
compared to chrome, and needing a bit more correction pre or post scan, but
having full detail to film base plus fog.  I'll have to look more closely
next time I scan a neg.

Dave


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