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