A dry extraction magnetic vibration plate. The clay-powder-coated squares are strong magnets; the entire surface vibrates, sending clay powder down the ramp, leaving magnetic impurities stuck to the squares. Photo courtesy of editor Zongjun Li.
Editorial Conversation: Chapter 7: From Yixing Ore to Zisha Clay
Master of Ceremonies here on Tea Technique.
Elsewhere, Founder & former CEO of Analytical Flavor Systems.
Previously, Founder and Executive Director of the Tea Institute at Penn State (defunct).