Digital BW, The Print

> I have a 30% dilution of the Noritsu K running in my 1400. ...

> The dilute dye shows more of the green characteristic.  


5% Magenta (Claria) mixed with the Noritsu K seems to give a rather straight Lab A for both black only and the 30% dilution when Epson Premium Glossy Photo Paprer is used.  
See  http://www.paulroark.com/BW-Info/NoritsuK-30pcK-5pcM-PGPP.jpg

However, other papers may need more.  10% M (with 90% K) diluted 30% still has some tendency to a reduced Lab A on Red River Ultra Pro Satin and Epson Archival Matte (yep, still have some old EAM).  But, these prints look very good.  I suspect they are typical.  
See http://www.paulroark.com/BW-Info/NoritsuK-30pc-10pcM-EAM-RR-UP.jpg

10% M on PGPP looks rather nice also, with more of a selenium hue and a bit warmer.  See 
http://www.paulroark.com/BW-Info/NoritsuK-30pc-10pcM-v-0pcM-PGPP.jpg

It may be for a general mix the 10% M is the best compromise.

Then again, the need for different mixes for different papers is what led to the variable tone approach and toners -- lots of options.

Paul
www.PaulRoark.com