Which three major innovations improve the printing technology in 17 century .
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Some important innovations that improved the printing technology after 17th century are as follows:-
1702- Multi-colored engraving invented by German Jakob Le Blon
1725 - Stereotyping invented by William Ged in Scotland
1800 - Iron printing presses invented.
1819 - Rotary printing press invented by Napier.
1829 - Embossed printing invented by Louis Braille.
1841- Type-composing machine invented.
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