Re: Sprintscan 120 issues/findings (comments welcomed)

["Ernst Dinkla" <E.Dinkla@xxxxxxxxx>]

----- Original Message -----
From: "Don Dement" <don.dement@verizon.net>
To: <scan@leben.com>
Sent: Monday, April 15, 2002 6:30 AM
Subject: Re: Sprintscan 120 issues/findings (comments welcomed)


> 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?

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



-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.