I've found my first ink bottle which I used in primary school - after 35 years. But I can't test it - it has now consistency of a tar ;-) : r/fountainpens
Pelikan 30 ml Bottle 4001 Fountain Pen Ink, Brilliant Brown
Schmincke Mussini Oil Color - Semi-Transparent, Atrament Black, 35 ml tube| Utrecht Art Supplies
De Atramentis Annie Oakley, Havanna
De Atramentis Historical Figure Inks for Fountain Pens - 15 Colors - 45ml | Provincial Mills
De Atramentis American History Ink - Benjamin Franklin - 45 ml Bottle | JetPens
De Atramentis Hans Christian Andersen, Petrol
Schmincke : Mussini Oil Paint : 35ml : Atrament Black | Jackson's Art Supplies
Atrament - Burnt Barrel Meadery - Untappd
Náplne : S.T. DUPONT - Ink Bottle Royal Blue - Atrament