Safety razor the rectangular dimensions shared by the wedge, standard single-edge, and double-edge blades. The injector, itself, was also the first device intended to reduce the risk of injury from handling blades. The Gillette blade dispenser released in 1947 had the same purpose. The narrow injector blade, as well as the form of the injector razor, also strongly influenced the corresponding details of the subsequently developed cartridge razors. Both injector blades and injector safety razors are still available on the market, from antique stock as well as modern manufacture. The injector blades have also inspired a variety of specialised blades for professional
Straight razor three factors: First according to the shape of the profile of the point of the razor, second according to the type of grinding method used for the blade; the degree of curvature, and therefore hollowness (or thinness), of the sides of the cross section of the razor blade depends on the grinding method. Finally the blades are categorised according to their width. Blades are, at first, categorised according to point, or nose, type. The following are the main types of points: The second category refers to the type of grinding method used and, since it affects the curvature of the