Printing device and printing method

摘要

A printing method for printing on paper wound in the form of paper roll which is characterised by the steps of storing printing conditions for a plurality of paper types, discriminating type of paper used by reading discriminating elements provided on said paper roll, and controlling the operation of said printing device to carry out printing on the basis of corresponding printing conditions. There may be one or more discriminating elements, which may comprise the outer diameter and/or a color element (i.e. the color and/or color concentration) of at least one holder mounted on paper roll is used as said discriminating element. Thus, it is possible to discriminate paper type upon mounting paper roll onto a printing device without use of complicated structure of printing device and without need of rotating paper roll.