I am just printing my Easyjet boarding passes out and was rather annoyed by the big colourful advert for National Express on each one! Anyway I have printed in black and white rather than waste a huge quantity of coloured ink on those ads.
They still look good quality but for peace of mind I thought I 'd check in case anyone had been given grief from any airlines for not printing in full colour.
By the looks have things I have still used half a gallon of ink on those poxy adverts! They should make these things as economical as possible to print out.