Digital BW, The Print

On 05/02/2008 CDTobie@... wrote:
> Unfortunately the way they mix grays in color mode uses CM&Y for the 
> light
> grays, not gray ink, plus a minimum of CM&Y as Epson and Canon do... 
> so the
> color mode is not acceptable for B&W printing, only the monochrome 
> mode, meaning
> only one tint, no crosstints, and no adjustment of tints, without 
> metamerism
> issues.

Do you have a source for that? I don't believe it is the case. Here gray 
appears to be used in all modes, colour, composite B&W and black+gray 
only. The printer exhausts the gray cartridge faster than any other.

HPB9180 helpfile for 'Print in grayscale' says
'Composite gray ...cyan, magenta, yellow and neutral inks
  Gray inks only ... neutral inks only rendering'

O'reilly review p2 at http://tinyurl.com/397dlm says

'If you print B&W using composite, some colored inks are used. The primary 
reason for this is to control the bronzing effect on coated photo paper. 
If you were to print gray inks only on glossy stock, for example, the 
bronzing might be very noticeable.'
-- 
Regards

Tony Sleep
http://tonysleep.co.uk