QTR-Quadtone RIP

Thanks Paul

That clears that up.  I was using the RGB values.  The Grayscale values match as you say.  I am new to Photoshop and my ignorance currently knows no bounds.  You have helped me find a new tool.

Ross

--- In QuadtoneRIP@yahoogroups.com, Paul Roark  wrote:
>
>  rossfmj  wrote:
> 
> > **
> >
> >
> > ... from Paul Roark's website;
> > http://home1.gte.net/res09aij/21-Step_GG22_L5.tif (marked for Gloss
> > Paper).
> >
>  I use the one at http://www.paulroark.com/BW-Info/21-step.jpg as it is
> easier to read from left to right.
> 
> 
> > Both of these show to not be linear in values for the graduations. Values
> > I get (% and on 255 8Bit Luminance Scale) are;
> >
> > Black 100% is 100% (0), 95% is 98% (5), 90% is 92% (19), 85% is 87% (33),
> > 80% is 81% (48), 75% is 76% ((62). The Luminance values do not match the
> > figures on Paul's test strip.
> >
> If you look at the "Grayscale" values, which is an option in the Info
> panel, do the values match the % markings on the test strips?  They do on
> my system.  The RGB numbers of the test strip you noted also match the RGB
> value in my Photoshop Info panel (except for 95% showing 13 instead of 12).
> 
> 
> >
> > Have these wedges been created with a conversion factor to open up the
> > blacks in linearisation?
> >
> 
> No.
> 
> Paul
> www.PaulRoark.com
> 
> 
> [Non-text portions of this message have been removed]
>