Digital BW, The Print

On 12/07/2012 12:12 PM, Tony Sleep wrote:
> On 06/12/2012 16:35, Tony Sleep wrote:
>>
>> No, HP grayscale mode uses only the blacks and gray/s. Colour channels are
>> turned off. There is no control of tint; the tint you get is that native
>> to the black and gray inks alone on the particular paper used.
>>
>> If you print grayscale in RGB mode then the colour channels are invoked as
>> well, but there is no ABW-like adjustment available, tint has to be
>> adjusted in PS.
>
> I forgot to mention that HP also have a "composite" B&W mode, which
> introduces a little colour into blacks+gray/s printing. It gives better
> Dmax and tonal smoothness with wider paper compatibility (reduced
> bronzing) than blacks & grays alone. Tint is uncontrollable since there is
> no ABW functionality. It is quite metameric, and in my limited experience
> prints are not so much cool but a lurid cyan. Which is why it is so
> forgettable.
>

Tony,

I think you scrape the driver functions of the Z3100 and B9180 together. 
  I have not seen a composite B&W mode in the Z3100/Z3200 PS3 or PCL3 
drivers, just an ABW-like grayscale mode with an Advanced Color Settings 
choice to adjust color tone etc in the B&W print on 3 sections of the 
tone range.  I see a composite + a greyscale B&W mode in the B9180 
driver, both not offering Advanced Color Settings for adjusting the B&W 
print. If color mode is chosen in all drivers Z+B then there is an 
Advanced Color Settings possible with settings on the RGB channels so 
different to the B&W ACS.

Mark has only Z3100-Z3200 Vivera tests if I recall it correctly.

-- 
Met vriendelijke groet, Ernst Dinkla

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012: 500+ inkjet media paper white spectral plots.