BS 2889 is an international standard that focuses on a method for the determination of the trash content of cotton and trash and lint content of waste intended for spinning.
BS 2889 specifies the method of determining:
BS 2889 is primarily intended for the use of the spinner. A method of use of the same apparatus intended for the filling and stuffing trade is described in BS 2889.
BS 2889 on a method for the determination of the trash content of cotton and trash and lint content of waste intended for spinning by the Shirley Analyser is useful for:
The trash content of raw cotton is of importance to the spinner on account of the detrimental effect on yarn quality of any particles which survive the opening, carding, and combing processes and the reduced yield of yarn that occurs with increasing trash content. Excessive trash often indicates unsatisfactory growing conditions and poor fibre quality.
BS 2889 informs about the Shirley Analyser which is a machine for separating the trash from the lint by making use of their different buoyancies in the air. BS 2889 specifies a procedure that has been devised to attain as complete separation as practicable with materials of the type normally encountered in cotton spinning. BS 2889 helps you to characterize the quality of cotton, a choice must be made between lint, trash, and non-lint. Experience has shown that the trash content is the most suitable value.
BS 2889 covers the determination of lint as well as trash in the testing of wastes, as the lint content is commonly used for characterizing the quality of waste.