For most people printer ink isn’t exactly dinner conversation, that is, until you come to my house. As HP’s resident Inkologist, I do my best to share the cool and complex work that goes into developing each HP ink formulation. Now, I certainly could go on and on with the formulas, bits and bytes of ink cartridge technology (it’s very interesting I assure you!), but today we’re going to take a look at the all important, and perhaps underappreciated, role of the cartridge foam.