Photo de stock - 26 May 2021, Berlin: A lab technician at the Gleitsmann Security company in Berlin mixes colours from countless colour variations to the gramme, according to specifications, until they meet the customer's requirements, which are then used to print banknotes. Gleitsmann Security Inks develops and produces security inks for central banks and their printing plants. Photo: Wolfgang Kumm/dpa. - Berlin/Berlin/Germany

Photo de stock: 26 May 2021, Berlin: A lab technician at the Gleitsmann Security company in Berlin mixes colours from countless colour variations to the gramme.

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