Razor be used on both sides, with two open edges. The blade on the double-edged safety razor is slightly curved to allow for a smoother and cleaner shave. In 1901, the American inventor King Camp Gillette, with the assistance of William Nickerson, patented a new variation of safety razor with disposable blades. Gillette realized that a profit could be made by selling an inexpensive razor with disposable blades. This has been called the razor and blades business model, and has become a very common practice for a wide variety of products. Many other brands of safety razors have come and gone.
Safety razor and inaccurate". Safety razors originally had an edge protected by a comb patterned on various types of protective guards that had been affixed to open-blade straight razors during the preceding decades. To maintain their cutting action, razors can be stropped using an old piece of jeans. Safety razors are usually made of razor steel which is a low chromium stainless steel which can be made extremely sharp, but corrodes relatively easily. Safety razor life may be extended by drying the blades after use. Salts from human skin also tend to corrode the blades, but washing and carefully drying them can