topic Why are magenta and cyan are used to print in grey scale? in Desktop Inkjet Printers https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Why-are-magenta-and-cyan-are-used-to-print-in-grey-scale/m-p/141700#M37722 <P>Why are the magenta and cyan cartridges used to print in grey scale? My Pixma 870 is drinking&nbsp;<SPAN>magenta and cyan cartridges even though I only print in grey scale.&nbsp;</SPAN></P><P>Thanks!</P><P>Laura</P> Mon, 25 May 2015 15:46:42 GMT laurawb 2015-05-25T15:46:42Z Why are magenta and cyan are used to print in grey scale? https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Why-are-magenta-and-cyan-are-used-to-print-in-grey-scale/m-p/141700#M37722 <P>Why are the magenta and cyan cartridges used to print in grey scale? My Pixma 870 is drinking&nbsp;<SPAN>magenta and cyan cartridges even though I only print in grey scale.&nbsp;</SPAN></P><P>Thanks!</P><P>Laura</P> Mon, 25 May 2015 15:46:42 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Why-are-magenta-and-cyan-are-used-to-print-in-grey-scale/m-p/141700#M37722 laurawb 2015-05-25T15:46:42Z