When asked about printing, most people will point to packages and publications, which is understandable considering these are the largest volumes. But there are also smaller runs that require the full gamut of a printer’s skills.   Trading and gaming cards are one category with complex needs. The old sports cards many of us collected as children are very different from today’s specialty cards, which can be printed on foils, can be die-cut, and much more. In reality, printing trading cards is an art form, incorporating different materials, various custom shapes and designs, and more.    It is also big business. Trading and gaming cards have grown in popularity in recent years, and the COVID-19 pandemic has increased interest in the hobby, as people found old trading cards and others took an interest in becoming collectors.   This is good news for RR Donnelley & Sons (RRD), a longtime specialist in printing trading cards. RRD will eq