Digital BW, The Print

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