Straight razor King C. Gillette: a double-edged safety razor with replaceable blades. These new safety razors did not require any serious tutelage to use. The blades were extremely hard to sharpen, and were meant to be thrown away after one use, and rusted quickly if not discarded. They also required a smaller initial investment, although they cost more over time. Despite its long-term advantages, the straight razor lost significant market share. As shaving became less intimidating and men began to shave themselves more, the demand for barbers providing straight razor shaves decreased. Since 2012, production of straight razors has increased multifold. Straight
Henry Jacques Gaisman he invented the glass-enclosed bulletin boards commonly used in hotel lobbies. He then worked briefly as a leather worker, then a leather dealer, and in 1894 moved to New York City where he sold his first financially successful invention, a belt that wouldn't slip. Later, he invented the safety razor, an invention which would allow him to develop into a wealthy businessman despite never completing his formal education. His safety razor was patented in May and July 1904, and was initially sold by the Auto Strop Safety Razor Company, a competitor to razor and blade manufacturer Gillette Razor Corporation, run