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QTR-Quadtone RIP

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Re: [QuadtoneRIP] Re: Convert to Grayscale vs Channel Mixer

2006-02-09 by Roy Harrington

Hi Diane,

You remember correctly.  Converting to the Gray Matte Paper or Gray 
Photo Paper is still
probably the usual workflow.  What has been added since that time is 
the capability to
make custom ICC printing profiles in addition to the generic ones 
above.  There will take into
account all the nuances of your particular printer/ink/paper.  They 
also provide full soft-proofing
including the hue of the print.  Naturally you would need to have a 
measuring device to take
advantage of this new tool.

Roy

On Monday, February 6, 2006, at 01:44  PM, Diane Fields wrote:

> Roy, I was printing with an earlier version of QTR last Spring when I 
> bought it and then did not do much b/w printing for awhile.  I also 
> unsubbed to this mail list so think I missed some things.
>  
> As I recalled, the workflow for best prints was to process 'however' 
> (I use a variety of ways), but to convert to a grayscale profile 
> before printing.  Has that all gone by the boards with the new 
> version?  Or--do I not remember the workflow correctly? (always 
> possible LOL).  I have 3 QTR profiles--lab, matte and photo paper.  
> Are these obsolete--or do I need to review the conversion/printing 
> process?
>  
>  
> Thanks,
> Diane
> -----------
> Diane B. Fields
> picnic@...
> photo site  http://www.pbase.com/picnic 
>
> ----- Original Message -----
> From: Roy Harrington
> To: QuadtoneRIP@yahoogroups.com
> Sent: Monday, February 06, 2006 2:18 PM
> Subject: [QuadtoneRIP] Re: Convert to Grayscale vs Channel Mixer
>
>
> If you shoot the picture in color there's certainly some benefit in 
> retaining that
> color info in Photoshop.   But the actual input to QTR is always 
> grayscale.  If you send
> a color image a conversion to grayscale is done automatically using a 
> simple default
> conversion.  I think in general you'd benefit by controlling that 
> color-to-gray
> conversion using Channel Mixer or other techniques.  If you do that, 
> you get an RGB
> file that is gray i.e. R=G=B.  This contains no more information than 
> a grayscale image.
> It will be identical data but three times the size.  The print result 
> will be identical.
> Whether or not you explicitly convert or not is just a matter of 
> convenience.
>
> Roy
>
>
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com

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