Hi Janet, I have conducted a quick experiment with a HP 5500dn colour laser, only black above 20% tint swelled. If you would like the Quark Express file to test other printers then please let me know. This printer has four separate colour cartridges. Mike Hefferan Learning Resource Development Officer RNIB College Loughborough, Radmoor Road, Loughborough, Leicestershire LE11 3BS 01509 611077 www.rnibvocoll.ac.uk <http://www.rnibvocoll.ac.uk/>