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== Colonial origins ==
From the year
The first successful creation of Vinylon was in 1939, by a [[Kyoto University]] research team in Japan.<ref name=":0">Lee, Hy-Sang. North Korea : a Strange Socialist Fortress. Westport, Conn., Praeger, 2001.</ref> However, Vinylon was later brought to North Korea by Ri Sung-Gi, one of the researchers of the Kyoto University team, amid North Korean campaign aimed at the recruitment of scientists and engineers from South Korea in the period following Korea's liberation from Japan in 1945. He was working as a professor at Seoul National University at the time.<ref name=":0" /> During the Korean war, when Seoul was occupied by the Democratic People's Army, Ri was offered a research position in North Korea.<ref name=":0" /> Ri Sung-Gi accepted and defected to the North.<ref name=":0" />
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