QTR-Quadtone RIP

On Thursday, September 14, 2006, at 03:12  PM, Shilesh Jani wrote:

> Hello Roy,
>
> Sorry to bug you with some Q's. I have yet to use the ICC facilities
> with the QTR system, and I am intrigued enough to try. As you know I
> use QTR for my b/w printing. I create the hue purely visually,
> without aid of an instrument. I linearize the curve with an old film
> densitometer. I do have access to an EyeOne machine, which I have
> used to make color profiles for PhotoShop and Epson driver. I am on
> a PC system.
>
> Let us say (1) I print the 4x21 step file using my choice of
> linearized curve with QTR, (2) measure with EyeOne, and (3) create
> the profile with Create ICC.
>
> Q: Can I use the resulting ICC profile for printing using PhotoShop
> and the Epson Driver?

Whenever you use any ICC profile for printing, its only appropriate for 
printing with
the exact same settings that were used to create the profile.  So if 
you make
a profile with QTR its only good for printing with QTR.

> Q: Or is it good only for soft-proof?

It's good for both printing and soft-proofing -- be sure to may 
attention to the
"Preserve Color Numbers" as I mentioned in the last post.

Note that the profiles made with QTR-Create-ICC are Grayscale ICC 
profiles.
Since they are for a grayscale workflow, they CONTROL just luminosity 
of the output
but they PROOF both luminosity and hue.
	
Roy

>
> Best regards.
>
> Shilesh
>
> --- In QuadtoneRIP@yahoogroups.com, "Amadou Diallo"
> <amadiallo2001@...> wrote:
>>
>> Thanks Roy, especially for the preserve numbers info. I ran the
> measurement files through
>> the droplet and the softproofing looks pretty good. A nice
> addition when using a RIP that
>> ignores profiles for grayscale images. This whole process is a
> really good demonstration of
>> the difference between calibrating and profiling. It's interesting
> to toggle the preserve
>> numbers box on and off to see the adjustments the profile would
> make during print
>> conversion.
>>
>
>
>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com