Success! I actually managed to clean out the printer cartridge, refill it and get it all working again (though for how long I don't know). Really I should confine myself to a monochrome laser printer then I just wouldn't have such problems. I don't bother printing off photographs or much else of the like. However, I always like to print off bookmarks like these shown here - a combination of advertising and calling card. There must be thousands of these scattered around the world now.