Germ killer silver: In the past the Mint, today the add
© Wächer aus [dim_it:pic_desc]Plastics are given antimicrobial properties while they are still being manufactured when additives are included in the process. For this purpose, germicidal substances are, for example, incorporated in polyethylene, polypropylene or polyamide, where they then have a disinfectant function thanks to the ongoing release of ions. Not only zinc oxide but also and above all silver are used in this context; the Chinese were already making acupuncture needles from the latter thousands of years ago. In addition to silver tableware and containers, silver coins were a popular disinfectant up to and including the 19th century, being put in water or milk. Modern processes are based on sterilising silver ions that diffuse from the material matrix to the surface and have an antimicrobial effect there: the cell membrane is destabilised, while metabolism and reproduction are disrupted at the same time, so that the microbe population is destroyed.[/dim_it:pic_desc]