Digital BW, The Print

> I print a lot of skies, and in low-res scans I have trouble with
> posterizing if I use severe levels or curve tweaks in 8 bit. Or if I
> blur to smooth out grain. But I can get away with the contrast tweaks
> just fine in hi-res scans. 

Isn't it also so, that you get more posterization problems if you apply
several adjustments at a "pixel level" through Image -> Adjust than what
you get if you apply your adjustments in adjustment layers. In the
latter case the shifts on the "pixel level" will be those of one
"resultant" adjustment instead of several.

Martin