The ASTM D4336-18 standard is used to determine the liquid output per stroke of a mechanical pump dispenser. The practice compares the performance of different pump dispensers by measurement of the average liquid weight dispensed from the pump dispenser at each actuation and provides consumers with accurate dosing instructions. This standard helps establish specifications for pump dispensers and Encasements and is applicable to spray or Flow rate type dispensers. The standard does not address all safety issues. Users need to take appropriate safety, health and environment measures before use and ensure compliance with relevant regulations. This standard conforms to the principles of international standards and is developed in accordance with World Trade Organization requirements.