BLACK LEAD Crossword Clue
BLACK LEAD Crossword Clue
We know 1 solutions for: BLACK LEAD
Crossword Puzzle Infos
Black lead is another name for the mineral GRAPHITE, which is an allotrope of carbon. It is a soft, black, crystalline material that is used in pencils and lubricants. GRAPHITE has been used since ancient times, and was first discovered in 1564. It is also used in batteries, brake linings, and foundry facings.