Printer giant Hewlett-Packard Friday rejected the results of an Australian study of particles emitted by laser printers. The Queensland University of Technology study pointed to HP printers as a major contributor to particles that could damage lungs.

"We do not believe there is a link between printer emissions and any public health risk," HP said in a statement. The study of 58 printers, ranked products as low, medium and high emitters of particles.

HP acknowledged its printers emit particles, but said: "these levels are consistently below recognized occupational exposure limits."