Hi, for this model irc6800 i heard it can be use as b/w and colour function by 2 separated drum unit. My supplier said theres no individual black toner for sell, we need to get 1 set toner CYMK. Sometimes we mostly print in black and this will make us keep CYM in many if in long term. But i heard somebody said we can use ir5000 genuine toner for irc6800 black and we still not really sure and confident about it even we got pretty lot of ir5000 genuine toner. May be the most experience technician here can verify it? Thank you
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