HP is working towards eliminating PVC from our products. As for print cartridges - LaserJet supplies are PVC free with the exception of the C8550A-53A, and the substance is present in the protective nozzle tape of some Ink cartridges, manufactured before 2003.
This subject is addressed in the print cartridges' IT Eco Declarations part S7/S6.1., available at: www.hp.com/go/ted.