During the 18th century, banknotes were being made predominantly by copper-plate engraving and printing, and they were being single-sided. Note-generating systems remained mainly unchanged through the 18th century.[sixty] The first banknotes have been produced by intaglio printing: this involved engraving a copper plate by hand and then masking it in https://bank-notes-euro-ebay70900.total-blog.com/how-to-card-clone-an-overview-51548984