Humans have been burning wood for thousands of years. Somewhere along the line it was discovered that burning only the outer surface of the wood improved its usefulness.

The most well known and cherished function of surface burning wood is charred oak barrels. Charred oak is what gives whiskey its warm amber color, distinct sylvan notes, and subtle smoky aroma. It defines an entire industry of spirits. Charring wood creates a layer of carbon on the outer surface of the wood that protects from UV, insects, and helps improve dimensional stability.