Digital BW, The Print

Hello Steve,

>3) What kind of purging process is necessary to switchover from color
>to B&W. 

I didn't have any problem putting MIS ink in my R200.  Just put in the
carts, let it do it's cleaning cycle, then run a nozzle check.  

To help prevent air from causing a clog, when swapping carts I find it
a good practice to let new carts sit in the slot for 5 minutes before
pushing the ink button to begin the cleaning cycle.  Seems to allow
the ink to settle down into the head.  A lot of problems that are
labeled as "clogs" are actually air pockets.  I had frequent problems
like this with my old 2200 and when I began this practice the problems
disappeared.

Another possibility, for running color and BW from the same printer,
is to put in MIS K and LK for two blacks, with LC and LM (or some
other combination) for toners and use QTR or some other RIP to control
the inks.  There are a number of custom blends used by people here. 
I'm they will share their techniques if you ask.

One other thing - once you get the new inks installed, run some test
prints and check for dither banding.  If there is some a head
alignment will often improve the output.  It made a significant
difference on mine.

Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm