(i) By the mid-19th century, Richard M. Hoe of New York had perfected the power driven cylindrical press. This was capable of printing 8,000 sheets per hour. This press was particularly useful for printing newspaper. (ii) In the late 19th century, the offset press was developed which would print up to six colours at a time. (iii) From the turn of the 20th century, electricallyoperated presses accelerated the printing operations. (iv) Methods of feeding paper improved, the quality of plates became better, automatic paper reels and photoelectric controls of the colour register were introduced. (v) The dust cover or the book jackets were introduced.