Fecha de publicación: 16/09/2022 Fuente: WIPO "hemp" A method is provided for manufacturing an elastic core yarn (50) in which a core (30) comprises an elastic fibre (10) and a continuous yarn (20) arranged along elastic fibre (10), and in which a covering yarn (40) of such a natural material as flax, hemp, ramié, bamboo, jute, is helically wrapped about the core (30). A step of helically wrapping the core (30) with the covering yarn (40) is carried out in such a way that a number T of coils covering yarn (40) is formed about a length unit of the elastic fibre (10) larger than a predetermined minimum value depending on the linear mass density Nm of covering yarn (40), and that the covering yarn (40) becomes twisted with a final twist direction "S" or "Z" that is opposite to an initial twist direction "Z" or "S", respectively, the step of wrapping occurring in a wrapping space (35) enclosed within a container (67).