Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., "jimhayes361" 
<jimhayes@j...> wrote:
> Has anyone noticed when using Paul's inks on a PC (Win98 in my case) 
> with standard VM ink, and Paul's workflow curves, on an 1280 if you 
> now get posterization in 3/4 tones when printed in pshop 7? That 
> wasn't there using pshop 6?
> 
> Just investigating something at the moment, and I need to eliminate 
> variables so I'm just asking questions right now, not suggesting 
> possibilities<g>
> Jim H.

I need to add something:

I just took the same file of a very dark subject and ran it through 
Paul's workflow with all color settings/ color spaces/options, and 
with the same order of steps converting to rgb and using the same mw 
curve for 2880 dpi.

So with everything else being exactly the same, I call up the 
histogram after preparing image for print in both photoshop 6 and 7 
(on same machine):




Pshp 6| mean=46.83 SD=71.55 median=10

pshop 7| mean=45.57 SD=72.27  median=8

It's repeatable. Although the differences are small, it means what is 
sent to printer is different data whether ver 6 or 7 is used. I would 
guess this is due to either a change in the way layers are merged when 
converting to RGB, a change in the way the data is converted from 
gamma 2.2 to sRGB, or a change in the way Paul's curve is applied as 
an adjustment layer.

I should be sending a real print (ver 6 vs 7) to the printer as a 
final step to test this, and will do so in a few days. At the moment I 
have OEM ink in my 1280.

Any comments on this? I really don't know what to make of it yet, 
maybe it's not signifigant.
Jim H.