What is cold rolling and when was it invented?

Cold rolling is one of the metal processing methods, commonly employed for shaping metal sheets or bars. In this process, the metal sheet or bar is shaped while in a cold state (not at high temperatures). This shaping process is typically conducted using presses or rolling machines. Modern cold rolling techniques and machinery became more widely used in the early 20th century. However, the origins of cold rolling can be traced back to the 19th century. Therefore, pinpointing the exact year of the invention of cold rolling can be challenging as its development has been continuous over time.