A detail using SPARK technology is pictured on a sheet of the Laika specimen series of banknotes produced by Koenig & Bauer Banknote Solutions, as a display of their possibilities using cutting edge technology such as SPARK, Susi Optics, using Intalglio or Offset to print on a polymer-based and cotton-based substrate, during a media visit in Lausanne, Switzerland, June 23, 2022. REUTERS/Denis Balibouse
