What type of further innovation come in print technology?

By the late eighteenth century, the press came to be made out of metal. Through the nineteenth century, there were a series of further innovations in printing technology. By the mid-nineteenth 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 newspapers. In the late nineteenth century, the offset press was developed which could print up to six colours at a time. From the turn of the twentieth century, electrically operated presses accelerated printing operations. A series of other developments followed. Methods of feeding paper improved, the quality of plates became better, automatic paper reels and photoelectric controls of the colour register were introduced. The accumulation of several individual mechanical improvements transformed the appearance of printed texts.