![Gizmodo on Twitter: "Why mathematicians are hoarding this special type of Japanese chalk http://t.co/aQPW7rNVCw http://t.co/IZ4UL6MWbr" / Twitter Gizmodo on Twitter: "Why mathematicians are hoarding this special type of Japanese chalk http://t.co/aQPW7rNVCw http://t.co/IZ4UL6MWbr" / Twitter](https://pbs.twimg.com/media/CHk5g9kWgAMUMc5.jpg)
Gizmodo on Twitter: "Why mathematicians are hoarding this special type of Japanese chalk http://t.co/aQPW7rNVCw http://t.co/IZ4UL6MWbr" / Twitter
Incunabula on Twitter: ""Hagoromo Fulltouch Chalk was at the very pinnacle of the chalk world. According to Conrad, its semi-mythical status, which prompted it to be hoarded by mathematicians before the company
![Incunabula on Twitter: "This is an untouched box of the legendary Hagoromo Fulltouch chalk, made in Japan circa 2014. The company closed down in 2015, and while a version of the chalk Incunabula on Twitter: "This is an untouched box of the legendary Hagoromo Fulltouch chalk, made in Japan circa 2014. The company closed down in 2015, and while a version of the chalk](https://pbs.twimg.com/media/Ez8slvfXMAcw1H5.jpg)
Incunabula on Twitter: "This is an untouched box of the legendary Hagoromo Fulltouch chalk, made in Japan circa 2014. The company closed down in 2015, and while a version of the chalk
![Hagoromo chalk: Why the demise of a Japanese company is a blow to mathematics | The Independent | The Independent Hagoromo chalk: Why the demise of a Japanese company is a blow to mathematics | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2015/06/17/13/chalk-afp.jpg)