Depending on the bar size, silver bars may be minted or cast. In 2014, the purity of all silver bars was increased to 999.9 and all cast bars were marked with a serial number.
While the stamped bars (1 oz to 500 g) are delivered in a blister card, the 1 kg and 5 kg bars are sealed in plastic film. The 15 kg bars are not packaged. No certificates are provided for minted or cast silver bars.
As of 2014 – The design of Heraeus bars has been repeatedly changed over the decades, so older bars may vary from this description.