Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Peter Marquis-Kyle <peter@...> 
wrote:
>
> On 13/05/2008 hflockwood wrote:
> > While waiting for Jon Cone to make his cartridge refill kits 
> > available, I've been using Epson carts on my R2400. 
> 
> > I ran a test of 
> > ABW against the QTR driver using Keith Cooper's B&W image (at 
> > www.northlight-images.co.uk/digital_black_white.html) printed on EEM.
> 
> > With ABW, I followed Clayton Jones's suggested workflow, Light tone 
> > and -5% ink and compared it with QTR using the quad2400 driver. In 
> > both cases I chose Neutral for EEM paper. 
> 
> > There is a subtle, but 
> > noticeable, difference, with the QTR driver producing a better tonal 
> > spectrum. 
> 
> > ABW does add a small amount of color, raising a question of 
> > long term stability. But I'm guessing that QTR uses only the three 
> > blacks and would, therefore, avoid this problem. Am I guessing 
> > correctly?
> 
> No Harry, the QTR UCmk-EEnhMatte-neut curve uses small amounts of colour 
> inks.  If you use QTRgui you can right-click on the name of the curve 
> (in the Curve Setup dialog) to show the ink curves.
> 
> To eliminate colour inks, choose the UCmk-EEnhMatte-warm curve. The 
> 'uncoloured' grey inks produce a very warm print on EEM.
> 
> Peter Marquis-Kyle
>

Peter,

Thanks for the correction, but I'll stand by  my observation on the tonal ranges.

It's sort of academic (for me) since I'll be going back to piezo inks as soon as Jon releases 
the refill kits.

Harry