Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla 
<E.Dinkla@c...> wrote:
> For some RIPs you can predict that the manufacturers will rather 
add 
> special (color) paper settings for B&W and (color) profile that 
> combination then add a separate Advanced B&W mode. I'm also curious 
how 
> they will split EPS and PDF documents in B&W and color. Will it be 
BO 
> for greyscale data like it has been or shall we get an extra split 
for 
> quad quality aka Advanced B&W?  I bet that the advice will be to 
use 
> neutral RGB for semi quad (= good neutral profiled color printing), 
> greyscale for BO and the rest color. With good profiling the result 
will 
> be better than it used to be, enough for a majority of RIP users
> 
> There's a thread on the colorsync list how the different renderings 
and 
> ink limitation interfere (and shouldn't) so it isn't as easy as we 
think 
> it should be.
> 
> Ernst

If you link the many black ink channels into one color (K), then BO 
becomes that entire K color. So it all depends on how the RIP deals 
with linking and mixing the inks. When you send a magenta to the RIP, 
you don't have to tell it which magenta to use, the RIP just fits it 
to the nearest point in the LUT, and spits out the correct amount of 
one or more channels. Same should apply to the 3 black channels, once 
mixed, you should get a continuous tone from the start point to the 
end point, and won't have to worry about whether it is using light, 
medium or full black ink (or any combination of those). And yes the 
mixing can make quite a mess out of your limits, but that's another 
topic of discussion.