Junius set an end-date of 1500 to his era of incunabula, which remains the convention in modern bibliographical scholarship.[1][2] This convenient but entirely arbitrary end-date for identifying a printed book as an incunable does not reflect any notable changes in the printing process, and many books printed for a number of years after 1500 continue to be visually indistinguishable from incunables. The term "post-incunable" is now used to refer to books printed after 1500 up to another arbitrary end date – typically 1520 or 1540, but there is no universal agreement among specialists. From around this period the dating of any edition becomes easier, as the practice of printers including information such as the place and year of printing in a colophon or on the title page became more widespread.[citation needed]