- ISO 3103 A standard published by the International Organization for Standardization for the brewing of tea so that comparisons can be made between different varieties.
Other ISOs relating to tea
- ISO 3720:2011 Black tea -- Definition and basic requirements
- ISO 11287:2011 Green tea -- Definition and basic requirements
- ISO 14502-2:2005 Determination of substances characteristic of green and black tea
There is also the food safety related ISO 22000.