Fig. 1.— Copper-Plate Pointers at Work. 

 From an Engraving by Abraham Bosse. 



THE THREE FORMS OF PRINTING USED 

 RESPECTIVELY FOR THE THREE MAIN 

 CLASSES OF PRINTS. 



I. Belief Pp.inting. 



This applies to woodcut and wood-engraving, and to metal plates cut, 

 engraved, or etched in relief. The printing is from the parts left in 

 relief, as in printing from type. The pressure required is comparatively 

 small and vertical, the press being the same in principle as the ordinary 

 printhig press. The ink (applied by a roller or otherwise) is thicker and 

 more sticky than that used in intaglio printing, so that it may lie on the 

 surface and not flow into the hollows. 



II. Intaglio Printing. 



This applies to all the intaglio processes B-G. Here the ink is not 

 taken from the surface but from the furrows, or hollows in the plate. The 

 ink is placed on the surface of the plate, and then pressed into the lines by 

 repeated taps with a pad called the clahher. Then the ink on the surface 



