Discovering shadow-hardened mainsprings is usually a troublesome process, however a number of strategies can be utilized.
Shadow-hardened mainsprings are manufactured from metal that has been hardened by heating it to a excessive temperature after which quenching it in oil. This course of provides the metal a martensitic microstructure, which could be very laborious and wear-resistant. Shadow-hardened mainsprings are usually utilized in high-performance functions, corresponding to firearms and racing engines.