Digital BW, The Print

I finally decided to stop trying to fix PS7 posterization -- the problem is when converting to RGB from greyscale -- and i have no idea on how to fix that (a transfer curve to make up the difference?)

.. my current workflow is to use PS7 for all manipulations in greyscale -- (and test printing using paul's GS curve) -- this works just fine in PS7 

(BTW i want to use PS7 because i'm now running OS X) ..

.. when i'm ready for some final prints -- i load up PS6 - convert to RGB -- apply curve -- then save to another filename)

..then reload on PS7 and print .. 

i'm guessing that i could also do the curve applicaiton in PS7 -- since the problem is when you do the greyscale to RGB conversion..

.. btw i tested this yesterday and got great prints 

-- ricardo


[Non-text portions of this message have been removed]

--- In DigitalBlackandWhiteThePrint@y..., "Ricardo Lagos" <
ricardo@s...> wrote:
> I finally decided to stop trying to fix PS7 posterization -- the 
problem is when converting to RGB from greyscale -- and i have 
no idea on how to fix that (a transfer curve to make up the 
difference?)
> 
> .. my current workflow is to use PS7 for all manipulations in 
greyscale -- (and test printing using paul's GS curve) -- this 
works just fine in PS7 
> 
> (BTW i want to use PS7 because i'm now running OS X) ..
> 
> .. when i'm ready for some final prints -- i load up PS6 - convert 
to RGB -- apply curve -- then save to another filename)
> 
> ..then reload on PS7 and print .. 
> 
> i'm guessing that i could also do the curve applicaiton in PS7 -- 
since the problem is when you do the greyscale to RGB 
conversion..
> 
> .. btw i tested this yesterday and got great prints 
> 
> -- ricardo
> 
> 
> [Non-text portions of this message have been removed]

Sounds great, but i don't have PS6-just PS7.  
Any thoughts.  I am very frustrated with the posterization and it 
makes my prints unacceptable.

btw has anyone tried nik color efex! to convert to b&w?

--- In DigitalBlackandWhiteThePrint@y..., "coveylaw" <brad@c...> 
wrote:

> Sounds great, but i don't have PS6-just PS7.  
> Any thoughts.  I am very frustrated with the posterization and it 
> makes my prints unacceptable.
> 
> btw has anyone tried nik color efex! to convert to b&w?

So someone else IS getting posterization.

The real answer is to simply have the curves redone by Paul or whoever 
is handy with a spectrophotometer. This is a lot of work for all the 
pritner/OS combos though. The curves should be redone in Adobe98 
rather than sRGB. I'd respect Paul he he refuses to go through it all 
again.

He might be able to do it with a transfer curve, I don't know. He 
hasn't responded to any posts on or off list from me on this topic, 
unless I missed it.

Also, there is still the unresolved issue of whether I get 
microbanding even using Adobe98 with PS7. I can't test it right now 
any further, as I'm short on ink to squander. My test print also still 
shows just a tiny bit more posterization in PS7 vs PS6 when using 
Adobe98. And of course the tones are different using this space. It's 
really crying out for a curve tweak.

Then the other solution is to just use PS6 until the 2200 comes out 
and go for it. That is a big unknown as well.

You could buy an older computer and network it up on the OS of your 
choice with PS6 and dedicate the printer to it. A bit of bother there.
Jim H.