LX900e comes with separate ink cartridges for cyan, magenta, yellow and black, which keeps operating costs low, since only one colour at a time needs to be replaced. (primeralabel.eu)
Maybe it's more economical to send them to a printer due to the high cost of ink cartridges? (theabundantartist.com)
In addition, the latest LX - Series model — the LX900e Color Label Printer — protects the environment by utilizing separate ink cartridges for cyan, magenta, yellow and black. (primeralabel.eu)