AutoTecknic Dry Carbon Fiber Gentleman's AshtrayProduct Description This is AutoTecknic real dry carbon fiber ashtray the perfect gift idea for someone who smokes cigarettes or cigars or loves carbon fiber. Dry carbon fiber is made in a pre preg and dry process consisting of vacuum forming sheets of carbon fiber into a mold at temperatures around 350 F sometimes referred to as an autoclave. This process allows carbon fiber to form a strong and lightweight composite like most race car parts.