... . No powder, quite clean 3. Make private logo Negative ion laundry washing ball Product Advantage :1. environment friendly silicone2 ... ceramic washing ball contains several natural mineral materials,like tourmaline, medical stone, meerschaum, quartz powder, bios to ... following steps: rolling four kinds of powders of phyllite, tourmaline, syderolite and quicklime, ball-grinding, adding non-ionic ...