With digital printing, customizing gift and loyalty cards, security badges and similar items is standard practice. With its IonTouch printer, HP is looking to take that a major step forward, y creating high-resolution displays on cards that can be rewritten to feature new messages.   Keith Moore, HP Fellow and head of the Print Adjacencies & Microfluidics Lab at HP Labs, noted that IonTouch technology emerged out of a request for rewritable paper, in which customers were seeking a more immediate recycling option for items like signage and labels.    “The engineers who worked on IonTouch had deep knowledge in both printing and displays and saw a way to create low-cost electronic-free rewritable signage,” Moore added.   Moore noted that the IonTouch printer is currently designed for plastic cards like gift cards, loyalty cards, employee badges, etc., but the technology is not limited to this form factor. IonTouch can be used in