Digital BW, The Print

But Bernd, even doing that, all my images so far will need tweaking won't
they? How major did you find that?

Julian

----- Original Message -----
From: " Ruhrfoto/Bernd L." <ruhrfoto@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Friday, October 12, 2001 7:17 PM
Subject: [Digital BW] MIS FS, Piezo driver Quality Workflow


> --- In DigitalBlackandWhiteThePrint@y..., "Martin Wesley"
> <mwesley250@e...> wrote:
>
> > Alternately you could and probably should do a new Custom
> Grayscale
> > curve in the Color Settings of Photoshop using a wedge
> printed with
> > FS inks. That alone might do the trick. Save the Piezo curve in
> case
> > you decide to switch back.
>
> Bingo !!!!
> Do it  and then print some images. They will lead you to some
> further minor corrections of the saved curve.
> Nothing more to do.
> Bernd
>
>
>
>
>
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--- In DigitalBlackandWhiteThePrint@y..., "Julian Thomas" 
<julianthomas@t...> wrote:
> But Bernd, even doing that, all my images so far will need 
tweaking won't
> they? How major did you find that?

Right, 
if your Monitor is calibrated and you choose the saved working 
space for MIS FS - the tweaking problem is minor, because you 
are in the WYSIWYG mode now.

You may save your tweaking curve and apply it as a baseline 
correction to all saved Piezo-images before printing them.

BTW I have always found it disappointing to print an old saved 
file without some minor tweaking. There seem to be too many 
variables in the game to guarantee the same outcome (be it your 
changing taste), no?

Bernd

If your file was saved in a previous grayscale setup, simply change PS's grayscale setup to your new custom dot gain 
grayscale space without the file open, then open the file and let it convert, print, don't save. If your file was in 16 bit so 
much the better, as the conversion will be less detrimental.
Personally, I don't see the point in saving master printer files in a custom grayscale space that may be irrelevant as the 
technology changes, or paper, or whatever.
Tyler

on 10/12/01 11:20 PM, Tyler Boley wrote:

> If your file was saved in a previous grayscale setup, simply change PS's
> grayscale setup to your new custom dot gain
> grayscale space without the file open, then open the file and let it convert,
> print, don't save. If your file was in 16 bit so
> much the better, as the conversion will be less detrimental.
> Personally, I don't see the point in saving master printer files in a custom
> grayscale space that may be irrelevant as the
> technology changes, or paper, or whatever.
> Tyler

Tyler,

Couple of questions.

With your workflow, can you basically work an image till it looks good on
screen and print to your favorite paper without a dot gain curve and get a
good screen to print match? Do you then apply a custom dot curve to suit the
image to other papers? Or do you use a custom dot gain curve for pretty much
all papers?

Do you use color management tools to create your custom dot gain curves or
do you eyeball it from a step wedge? Does a spectro give you data that you
can use in a meaningful way to set your curve quickly, or does it still end
up taking a few rounds of best judgement applied to a wedge?

Todd

--- In DigitalBlackandWhiteThePrint@y..., Todd Flashner <tflash@e...>
wrote:
Todd, in the post you replied to, I was referring to a Piezo
workflow, not mine. So I'm not sure the answers to your questions 
will be meaningful.
> With your workflow, can you basically work an image till it looks
good on
> screen and print to your favorite paper without a dot gain curve
and get a
> good screen to print match?
Yes, including the monitor image after CMYK conversion. Not perfect,
but close enough. Things feel so different to me on 
paper than on monitor that it's never a one shot deal.

> Do you then apply a custom dot curve to suit the
> image to other papers? Or do you use a custom dot gain curve for
pretty much
> all papers?
My workflow doesn't use a custom dot gain curve when in grayscale,
the CMYK custom ink setup includes a dot gain curve 
for each of the 4 quad inks, as well as their specific LAB values,
the value of the paper white, and values of their various 
combinations.  A custom ink setup is required for each paper in order
to develope proper separation curves for them. 

> Do you use color management tools to create your custom dot gain
curves or
> do you eyeball it from a step wedge? Does a spectro give you data
that you
> can use in a meaningful way to set your curve quickly, or does it
still end
> up taking a few rounds of best judgement applied to a wedge?
The spectro gives CMYK dot gain numbers very quickly, they are
difficult to eyeball. Real World Photoshop 5 has good info 
about it, including eyeballing. Don't have RWPS 6 yet.
Once a good CMYK setup is in place, developing the actual separation
curves takes several rounds. Actually, it's much 
faster creating curves with Dan's RGB profile method than CMYK,
because the profile samples so many patches of ink  
combinations.
Tyler