Answer:
(i)
By the late 19th century, the press came to be made out of metal.
(ii) 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 newspapers.
(iii) In the late 19th century, the offset
press was developed which could print up to six colours at a time.
(iv) By 20th century, electrically operated
presses accelerated printing operations.
(v) Other developments were?Methods of feeding
paper improved, the quality of plates became better, automatic paper reels and
photoelectric controls of the colour register were introduced.
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