Digital BW, The Print

Hi,
I'm going to measure Dmax for my papers using 21-Step Wedge image file of Paul 
Roark. (with Spectrocam and Sepctrocam 1.7.2 for Mac OS X)

I want to know setting of print pannel for printing 21-step Wedge image file.

==============
Sorce Space: Document Space
Print Space: Same As Source

Advanced Setting, 1440 or 2880 dpi, etc.
No Color Adjustment
==============

Is this right?
Thanks,


younghoon

> From: nextxixar [mailto:nextxixar@...]
>
> I'm going to measure Dmax for my papers using 21-Step Wedge image
> file of Paul
> Roark. (with Spectrocam and Sepctrocam 1.7.2 for Mac OS X)
>
> I want to know setting of print pannel for printing 21-step Wedge
> image file.
>
> ==============
> Sorce Space: Document Space
> Print Space: Same As Source
>
> Advanced Setting, 1440 or 2880 dpi, etc.
> No Color Adjustment
> ==============
>
> Is this right?

That'll do it. Of course, you don't need the whole wedge just to find the
Dmax. But it's worth knowing if the paper/ink/driver combo clips at the low
end--often, you find the last few patches are nailed to black. I suppose
it's even possible that 100% will be less dense than 95%, because of the way
the driver mixes colors with the black.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul D. DeRocco" 
<pderocco@i...> wrote:
> > From: nextxixar [mailto:nextxixar@y...]
> >
> > I'm going to measure Dmax for my papers using 21-Step Wedge image
> > file of Paul
> > Roark. (with Spectrocam and Sepctrocam 1.7.2 for Mac OS X)
> >
> > I want to know setting of print pannel for printing 21-step Wedge
> > image file.
> >
> > ==============
> > Sorce Space: Document Space
> > Print Space: Same As Source
> >
> > Advanced Setting, 1440 or 2880 dpi, etc.
> > No Color Adjustment
> > ==============
> >
> > Is this right?
> 
> That'll do it. Of course, you don't need the whole wedge just to find the
> Dmax. But it's worth knowing if the paper/ink/driver combo clips at the low
> end--often, you find the last few patches are nailed to black. I suppose
> it's even possible that 100% will be less dense than 95%, because of the way
> the driver mixes colors with the black.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...

Many Thanks! :-)


younghoon

What are the best settings for the Spectrocam and what reading are you using to determine dmax? 
Mine is set to observer 2 degree, illuminant D50, density status I, absolute checked (in CIE Data Window). 
Which do you read:
Density values (C,M,Y,Vis)
L,a,b,C
hue
u,v
Thank you very much. I have always wondered which reading actually is giving the dmax.

----- Original Message ----- 
From: "Paul D. DeRocco" <pderocco@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Wednesday, January 28, 2004 12:17 AM
Subject: RE: [Digital BW] 21-Step Wedge printing


> From: nextxixar [mailto:nextxixar@...]
>
> I'm going to measure Dmax for my papers using 21-Step Wedge image
> file of Paul
> Roark. (with Spectrocam and Spectrocam 1.7.2 for Mac OS X)
>
> I want to know setting of print panel for printing 21-step Wedge
> image file.
>
> ==============
> Source Space: Document Space
> Print Space: Same As Source
>
> Advanced Setting, 1440 or 2880 dpi, etc.
> No Color Adjustment
> ==============
>
> Is this right?

That'll do it. Of course, you don't need the whole wedge just to find the
Dmax. But it's worth knowing if the paper/ink/driver combo clips at the low
end--often, you find the last few patches are nailed to black. I suppose
it's even possible that 100% will be less dense than 95%, because of the way
the driver mixes colors with the black.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

-----Original Message-----

From: Paul D. DeRocco [mailto:pderocco@...] 
Sent: 28 January 2004 05:18
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: RE: [Digital BW] 21-Step Wedge printing

> From: nextxixar [mailto:nextxixar@...]
>
> I'm going to measure Dmax for my papers using 21-Step Wedge image
> file of Paul
> Roark. (with Spectrocam and Sepctrocam 1.7.2 for Mac OS X)
>
> I want to know setting of print pannel for printing 21-step Wedge
> image file.
>
> ==============
> Sorce Space: Document Space
> Print Space: Same As Source
>
> Advanced Setting, 1440 or 2880 dpi, etc.
> No Color Adjustment
> ==============
>
> Is this right?

That'll do it. Of course, you don't need the whole wedge just to find the
Dmax. But it's worth knowing if the paper/ink/driver combo clips at the low
end--often, you find the last few patches are nailed to black. I suppose
it's even possible that 100% will be less dense than 95%, because of the way
the driver mixes colors with the black.
----------------------------------------------------------------------------

What is the procedure for measuring reflection density using a Spectrocam.



---
[This E-mail has been scanned for viruses but it is your responsibility 
to maintain up to date anti virus software on the device that you are
currently using to read this email. ]

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Diana York" <diana@h...> 
wrote:
> What are the best settings for the Spectrocam and what reading are you 
> using to determine dmax? 
> Mine is set to observer 2 degree, illuminant D50, density status I, absolute 
> checked (in CIE Data Window). 
> Which do you read:
> Density values (C,M,Y,Vis)
> L,a,b,C
> hue
> u,v
> Thank you very much. I have always wondered which reading actually is 
> giving the dmax.

My setting is just same as yours, and I thought 'Vis' value is Dmax.
Am I wrong?


younghoon