US Patent 8177897 - Phase change inks containing CNTs

http://www.freepatentsonline.com/8177897.html

This patent from Xerox teaches using carbon nanotubes to improve the thermal stability and blackness of phase change inks used in inkjet printers. Claim 1 reads:

1. A phase change ink comprising

(a) a phase change ink carrier and

(b) a colorant wherein the colorant comprises carbon nanotubes wherein the carbon nanotubes have a length of about 500 micrometers to about 1,000 micrometers.