1. A roll of label stock comprising: a plurality of labels, each of the plurality of labels including a first region for being printed on by thermal printing, said first region being blank; and each of the plurality of labels including a pre-printed color image associated with a respective one of the first regions; and wherein, the pre-printed color image of one of the plurality of labels includes a first pre-printed color image, and the pre-printed color image of another of the plurality of labels includes a second pre-printed color image that is different from the first pre-printed color image, each of the first and second different pre-printed color images defining a picture image and being disposed at difference locations along a length of the label stock.