If HP does allow you to damage cartridges by putting them in and taking them out, how do you use the printer ??? I have a Canon A3 printer, which I put a big black tank in for non colour stuff IE A3 Schematic and PCB Panel drafts (I get the PCB house to photoplot the final) a Photo tank for the photographic reproductions, a standard colour tank for kids rubbish , I may change each head tank assembly 20 times per life of the ink. Regards, Kat. ____________________________________________________________________________ /"\ ASCII Ribbon Campaign | K.A.Q. Electronics \ / - NO HTML/RTF in e-mail | Software and Electronic Engineering X - NO Word docs in e-mail | Perth Western Australia / \ | Ph +61 419 923 731 ____________________________________________________________________________ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads