ISO 3103

[1] It was originally laid down in 1980 as BS 6008:1980 by the British Standards Institution,[2] and a revision was published in December, 2019 as ISO/NP 3103.

[3] It was produced by ISO Technical Committee 34 (Food products), Sub-Committee 8 (Tea).

The abstract states the following: The method consists in extracting of soluble substances in dried tea leaf, contained in a porcelain or earthenware pot, by means of freshly boiling water, pouring of the liquor into a white porcelain or earthenware bowl, examination of the organoleptic properties of the infused leaf, and of the liquor with or without milk, or both.This standard is not meant to define the proper method for brewing tea intended for general consumption, but rather to document a tea brewing procedure where meaningful sensory comparisons can be made.

[4][5] The Republic of Ireland was the only ISO member country to object to the standard, doing so on technical grounds.

In 2003, the Royal Society of Chemistry published a press release entitled "How to make a Perfect Cup of Tea".