The fact that refills for mechanical pencils made of graphite are baked and not made of polymers is by no means self-evident, even an absolute rarity for the smallest formats. These mines are.

The history of the renowned pencil manufacturer Koh-i-Noor dates back to the 18th century. Throughout the world, Koh-i-Noor became known through the innovative invention of Joseph Hardtmuth, who in 1792 developed a novel method for pressing and baking pencil leads - mines did not have to be cut from the solid stone any longer. This innovative ability has been preserved at Koh-i-Noor to this day.