Ajanlom figyelmedbe a ISO 3103 szabvanyt :D
"ISO 3103 is a standard published by the International Organization for Standardization (commonly referred to as ISO), specifying a standardized method for brewing tea, possibly sampled by the standardized methods described in ISO 1839. It was originally laid down in 1980 as BS 6008:1980 by the British Standards Institute. It was produced by ISO Technical Committee 34 (Food products), Sub-Committee 8 (Tea)."