Hagoromo's Fulltouch chalk has developed a cult following among mathematicians.<br />Some call it the Bentley of chalk, the Stradivarius of writing utensils. Some say it's unbreakable.<br />Others say it leaves no dust behind.<br />The chalk has been called the math world's best kept secret.<br />The formula is still a secret and when the company announced it would cease production there was a mad rush to stock piles boxes of the chalk.<br />The Japanese chalk company was eventually saved by a South Korean investor.<br />Thankfully, Hagoromo's Fulltouch still being produced today. Its secret formula remains unmatched.
