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In the history of North Korean chemical engineering, two scientists stand out above all others: Ri Sŭnggi (李升基, 1905-1996) and Ryǒ Kyǒnggu (呂慶九, 1913-1977). Ri and Ryǒ were both born in the southern region of the Korean peninsula, studied in Japan, and returned home after Korea’s liberation from Japan in 1945. They were both professors at Seoul National University for some time and then went to the North. In North Korea, Ryǒ and Ri conducted experimental projects on polyvinyl chloride (PVC) fiber and polyvinyl alcohol (PVA) fiber respectively. Ryǒ was once a leading scholar in his field; however, his top position was taken over by Ri after the PVA fiber that Ri was researching was successfully industrialized. Despite the fact that Ryǒ Kyǒnggu also contributed to the development of the North Korean chemical industry, his name and whereabouts received little attention in North Korea for quite a while. Experimental science is closely intertwined with society and politics. Socio-politics influences the direction of experimental science and the result of the experiment is connected to the evaluation of the political

When the Political Spotlight is On: Social Evaluations of Ri Sŭnggi and Ryǒ Kyǒnggu, Two Chemical Engineers in North Korea