Flat Transfer Printed:
Due to irregularities of surface, it is not possible to print direct onto a ceramic surface. In 1756, Sadler and Green of Liverpool developed the technique of printing a design onto a thin tissue paper which was then rubbed face down onto the tile surface, before the ink dried. Initially the inks were made with enamel colours applied over-glaze, but these were soon superseded by ceramic colours which could be applied under-glaze. The earliest Sadler and Green tiles were printed from woodblocks (1756), but within 6 months, they were using copper plate engravings.