Printer and ink film

A printer is transferred to an image transfer area a plurality of individual ink colors, which are repeatedly arranged in a longitudinal direction of the ink film to make a transferred image as in an image formation area of ​​an intermediate transfer belt which is formed as a result of overlaying single color images, and further transfers the transfer image of the intermediate transfer belt to an object to be printed, whereby a desired image is formed on the article. During the course of that first single ink color C is transferred from the ink sheet to an image formation area of ​​an intermediate transfer belt to form a monochrome image in the first color, a positioning mark is transferred by the use of an area of ​​black ink which at one width edge of a range the first single color of ink of the ink film and is provided outside the image forming region of the intermediate transfer belt.