I really needed ink ASAP to print off notes for a really important university examination. The ink arrives, and the printer cannot recognise the blue. I can not order a new batch in time for my exam and the weather (SNOW) prevents me from being able to buy any elsewhere. Im incredibly dissapointed at this SCAM and cant believe the fact that i am unable to make proper preperations for my exam. Do not buy this ink, buy it elsewhere if you want the cartriges to be RECOGNISED by your printer.