100 years DIN A4 formatCurious standards from tea to clay
Tea is quickly made in everyday life. But not when it comes to ISO standard 3103. Here, the process is explained in great detail over six pages. You can read these and other strange guidelines here.
© Finn Winkler/dpa
The ISO 3591 standard, originally introduced in 1977 and confirmed this year, sets out the specifications for the manufacture of a glass for wine tasting.