This is what ballpoint ink was tested against to make it
allowed to use for documents which were to be archived.
I think the first ballpoint to be approved was before
1964, but I don't know if the same regulation in detail as
below was in force then or if this proclamation was
changed in other paragraphs.
Translation of part of Proclamation (1964:504) on the use of writing material in
government activities (cancelled 1991)
10 § For approval of an ink it is required, that the
writing withstands the effects of daylight, air, water and
alcohol as much as an ink made of the following
ingredients: 23.4 grams of anhydrous tannin, 7.7 grams of
crystallized gallic acid , 30 grams of copperas, 10 grams
of gum arabic, 1 gram of carbolic and hydrochloric acid
equivalent 2.5 grams hydrogen chloride, all per liter, and
that the ink is otherwise suitable for the production of
documents, as stated in 8 §.
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