Why Mathematicians Are Hoarding This Special Type of Japanese Chalk gizmodo.com

posted by  banzaitokyo | 4 years, 11 months ago in Science & Technology

This spring, an 80-year-old Japanese chalk company went out of business. Nobody, perhaps, was as sad to see the company go as mathematicians who had become obsessed with Hagoromo Fulltouch Chalk, the so-called “Rolls Royce of chalk.”

With whiteboards and now computers taking over classrooms, the company’s demise seemed to mark the end of an era.