Digital BW, The Print

In a message dated 11/6/2007 2:50:33 P.M. Eastern Standard Time,  
oaksfield@... writes:

But are  the cartridges then bone dry Bob, or still have 30% left in them, as 
has  been suggested in earlier posts?

Tony Wells,
A new group member from  England.



Re: large format cartridges:
 
Inside the plastic cartridge housing is a bag which actually holds the ink.  
As ink is drawn (pumped) from this bag through the valve on the cartridge, a  
certain level of pressure is maintained so that the ink lines will not have 
air  in them. It is always necessary to have some ink in the bag to maintain a  
continuous inkflow, bag to printhead. Thus the bag can never be 'bone dry'. 
30%,  however, is not going to be left in the bag when the printer stops 
printing...  that's a lot of ink. The machine will refuse to do a cleaning cycle with 
 low ink pressure, but will still print or do a nozzle check. If it refuses a 
 cleaning cycle, you know it's very low on  ink.
One way to determine for yourself, is to weigh a full cartridge, and weigh  
an empty one. You will always know how much ink you have left by weight.
 
Richard Massie



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