👉 Rehardened is a term that refers to the process of removing or reducing the hardness of something, such as an object, substance, or material. It involves the removal of its original chemical composition and physical structure, leaving behind only its outer layer or surface. Rehardening can be done through various methods, including mechanical processes like drilling or tapping, chemical treatments like treating with acid or other solvents, or thermal treatment with heat. This process is often used in the manufacturing industry to improve the
