Gizmodo's Sarah Zhang explains this legendary … chalk.
The first thing you notice is a shiny, clear coating on the outside — it feels like a thin layer of enamel. That sounds like a minor design element, but it cuts down on the biggest annoyance with chalk: dusty fingers.
Academics are breathless with awe at this incredible … chalk. Satyan Devadoss, a Williams College math professor, writes of the "Dream chalk."
There have been rumors about a dream chalk, a chalk so powerful that mathematics practically writes itself; a chalk so amazing that no incorrect proof can be written using this chalk. I can finally say, after months of pursuit, that such a chalk indeed exists.
I have just bought a $60 box of chalk.
I do not own a blackboard.
Hagoromo Fulltouch White Chalk 72pcs [Amazon referral link]