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Process for manufacture of polyamide filaments of low and uniform tendency to shrink which comprises causing freshly stretched filaments to move in four successive circumferential paths defined by four successive portions of roller along length of roller, filaments being stretched by movements in first path which is at temperature of at most 110 C, then being relaxed while moving in second path which is of smaller diameter than first at temperature of 120 to 200 C. (Appl Great Britain Jan 28 1964) (21093)