Digital BW, The Print

You know, I think this has probably been covered somewhere in the
group 
but I've searched using a variety of terms and haven't found the
thread 
yet...
So, just getting in to the printing end of the process. I have a 1280 
and just bought a set of MIS inks. All I've ever done with the
printer 
priior to this is simply run epson or generic cartridges until they
are 
empty and then replace them. 
I'd like to put the MIS inks in, make some prints and then put the 
standard cartridges BACK in again. So, when taking a non-empty 
cartridge out of the printer do I tape over the vent and ink holes, 
removing the tape when I reinsert or something else?
I'd like to be able to switch to MIS inks, doa few prints and then 
swith back for "regular family use".
Thanks,
Milt