Tom Del Rosso wrote:
"Jasen Betts" wrote in message
news:g8mg8u$hg1$2@gonzo
I did only colour reduction (to 4 colours) and produced a 3.6 meg PDF
at the original resolution (down from 11 meg)

Can they be reduced to 2-color, or doesn't PDF support that?

A scan of black and white material generally looks awful if
reduced to two colors. You need a few shades of gray to
smooth out the edges. 4 or 16 shades of gray (2 or 4 bits
per pixel) usually is enough to improve appearance a lot.

--
Regards,

John Popelish