AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Development 1 – Gutenberg's Moveable Type Press (c. 1448):
Before Gutenberg, books were copied by hand, making production extremely slow and costly. Gutenberg's metal moveable type press could print 250 sheets per side per hour, making books far cheaper and more widely available. In just 1450–1550, about 20 million printed copies flooded European markets.
Development 2 – Power-driven Cylindrical Press (mid-19th century):
The earlier hand-operated press had limited speed. Richard Hoe's power-driven cylindrical press could print 8,000 sheets per hour, dramatically accelerating newspaper production and making print accessible to mass audiences rapidly.
Source: Chapter 5, Sections 2.1 and 5.2
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