Digital BW, The Print

The Noritsu black 500 ml cart looks and acts just like a giant Epson 7800 cart.  It's made by Epson.  The same modified bottom fill adapter I use for the Epson carts works just fine on the Noritsu cart.  
See http://www.paulroark.com/BW-Info/Modified-Bottom-Fill-Adapter.pdf

I profiled Epson Premium Glossy paper, as well as some others, with Claria black loaded into the Cyan position of my 1400. (Eboni-6 is in the rest of the positions.)  Later I removed the Claria and put Noritsu K into the C position and used the Claria profile to print on some Premium Glossy paper.  They look very similar.  The Claria profile was probably as close as one could expect when comparing 2 different dye batches.

A graph of the Lab A and B for the 2 inks is posted at 
http://www.paulroark.com/BW-Info/Claria-Noritsu-PremGloss.jpg

You can adjust for the spectro drift by looking at the paper white readings, which ought to be identical.

My initial reaction is that these are just different batches of the same ink.

Paul
www.PaulRoark.com