You should scan BW film at 4000 ppi for printing. But inkjet BW prints are
just okay when using color inks and conventional printer driver software.
There are special ink sets and software available for BW printing, but then
you have to dedicate a printer to just BW. Some of the pros I've talked to
print BW for their portfolios on the Epson 2000B with the special ink and
drivers. They keep a 1280 for printing color. But the darkroom is still the
best way to go for BW. (And I'm sure they'd have to drag you out kicking
and screaming :-).
For BW PUG submissions or other web applications, I usually print a 7x
10 in the darkroom and then scan it on my cheapy Epson flatbed scanner.
It's quite adequate for that. If I have time, I'll take it to work and scan
it on the big Agfa. (I used the Agfa for this month's submission.) I
generally scan it at a fairly high resolution, perhaps 800 ppi or so. (a
4000 ppi scan of a 7x10 would create a humongous file of somewhere around a
gigabyte. Remember ppi is pixels per inch.) I then lower the resolution in
Photoshop to the 72 ppi on the 600 point by 400 point that is standard
for PUG. I don't know if it's better to scan high res and then resample it,
or if I should aim for the size I want. But the method I'm using seems
quite adequate.
Paul
Shel Belinkoff wrote:
> OK ... I think I've got it now.
>
> One more question. Everyone's describing color. How does all this work
> with B&W? Do I need as many bits to get good B&W results?
>
> Jan van Wijk wrote:
>
> > Yes, except that "16 bits" is not 16
> > different colors but "2 to the power of 16"
> > which is 65536!
> >
> > (see my other reply for more examples)
> >
> > In you above anlogy, you could have a pixel
> > using "24 bits" which would be 8 bits for each
> > basic color Red, Green and Blue.
> >
> > It would mean the scanner can select between
> > 256 different Reds, 256 different Greens
> > and 256 different Blue cans of paint to mix
> > to get the color for that one pixel.
> > (that is over 16 million different colors to choose from)
>
> --
> Shel Belinkoff
> mailto:[EMAIL PROTECTED]
> http://home.earthlink.net/~belinkoff/
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