This standard specifies a method for determining the viscosity of dried powdered starch and modified starch using a rotational viscometer and a Brabande Viscosity Test Device. The rotational viscometer method involves temperature-controlled equipment and Stirrer to determine the flow resistance of starch pastes. The standard describes in detail the instruments, reagents, and procedures required to ensure the accuracy of the determination results. This method is used to evaluate the rheological properties of starch and provides important data for the food industry and related applications.