For ages we have been saying that printer ink provided by HP was obscenely expensive. However now a graph has appeared on the internet which confirms that it is the most expensive fluid in the world. (Not really, bull seamen still costs more. sub.ed.)

The graph shows that human blood is pretty expensive at .39 cents a ml. But HP printer ink is more than double that price. Penicillin which has done a lot more for humanity than HP printer ink can be picked up for less than 10 cents a ml while crude oil is only a cent.

HP has always upped the price of its printer ink so that it can keep the price of its printers down, however if you could work out a way of keeping the jets from clogging up it would be cheaper to print documents using your own blood.