In the history of the modern pencil, who patented the graphite-and-clay lead method in 1795?

Nicolas-Jacques Conté patented the graphite-and-clay lead method for the modern pencil in 1795.

The method solved a serious supply problem during the French Revolutionary period. France was unable to import the high-quality graphite traditionally obtained from Britain because of the British naval blockade. Conté was asked to develop a practical substitute that did not depend on imported solid graphite.

He mixed powdered graphite with clay, pressed the mixture into rods, and enclosed the rods in wood. By changing the graphite-to-clay ratio, manufacturers could produce leads with different degrees of hardness. That adjustable formula remains the foundation of conventional graphite pencil production.

Conté is sometimes confused with the Conté crayon, a separate drawing medium also named after him. He developed both kinds of artistic materials, but his graphite-and-clay invention specifically transformed ordinary writing and drawing pencils. The familiar term pencil “lead” is also misleading: the core is graphite, not metallic lead.