In order to estab1ish an a1gin industry in our country, we carried out a series of experiments from 1952 to 1955, concerning to the extract10n of algin from Sargassum pallidum, an a1ga occurring abundantly along the North China coast. The resu1ts obtained have shown that a1gin extracted from. Sargassum pallidum was quite satisfactory in qua1ity and the yie1d was good enough. Based on these resu1ts, an a1gin factcry was founded at the beginning of 1957 in Tsingtao, utilizing this species of Sargassum as its raw material.