Science Fair Project Encyclopedia
- This article is about the cutting device. For philosophical principles inspired by the razor, see Occam's Razor or Hanlon's razor.
In its simplest form, a razor is a steel blade attached to a handle. Using a razor, the practice of removing body hair is a common method of depilation. A razor is most commonly used by men to shave their facial hair, sometimes all of their hair, and by women to shave their leg and underarm hair and, sometimes, pubic hair.
The safety razor was developed in the mid-1800s. Early razor blades needed continuous sharpening, soon becoming worn out, making them expensive. The Kampfe Brothers developed a type of razor along these lines. The safety razor first developed in the United States by the Kampfe Brothers used a forged blade.
In 1903, the American inventor King Camp Gillette invented a safety razor with disposable blades. Gillette realized that a profit could be made by selling a safety razor at a reduced price and then making a nice profit margin on the inexpensive disposable blades. This has been called the Razor and blades business model, or a "loss leader". To realize his idea, Gillette founded the American Safety Razor Company on September 28, 1901. The company's name was changed in July 1902 to Gillette Safety Razor Company. Gillette's particular innovation for disposable safety razors (patent US775134) beat out competitors.
Gillette's thin blade was covered by the razor, thus protecting the skin against deep cuts. This enabled people to safely shave themselves for the first time. Plastic disposable razors and razors with replaceable blades, often with two or three cutting edges (but sometimes with four cutting edges), are in common use today.
The electric razor (also known as the electric dry shaver) is an common electrical shaving device with a rotating or oscillating blade. The electric razor does not require the use of shaving cream, soap, or water. It was invented in the 1930s by the American manufacturer Col. Jacob Schick . The Remington Rand Corporation developed the electric razor further, first producing the Remington brand of razor in 1937.
Another important inventor was Prof. Alexandre Horowitz, from Philips Laboratories in the Netherlands, who invented the very successful concept of the revolving electric razor. It has a shaving head consisting of cutters that cut off the hair entering the head of the razor at skin level. The razor is powered by a small AC motor, and usually has rechargeable batteries.
Early versions of electric razors were meant to be used on dry skin only. More recent electric razors have been designed which allow for shaving cream and moisture.
A box cutter knife (often called a utility knife) is a common tool used in grocery stores and other places. Such a knife generally consists of a simple and cheap holder, typically flat, approximately one inch wide and three to four inches long, and typically made of either metal or plastic. Some use standard razor blades, others specialised double ended blades.
A potato peeler is a metal blade attached to a metal, plastic or wooden handle that is used for peeling vegetables, usually potatoes.
Razor wire is a mesh of metal strips with sharp edges whose purpose it is to prevent passage by human beings. Furthermore, razor wire is sharper than the barbs of barbed wire.
- Main : Shaving, Beard, Facial hair, Barber, Haircut, Leg shaving, King C. Gillette, Timeline of invention
- Companies : The Gillette Company, BIC Corporation, Remington Rand
- Miscellaneous: Scooter, General nature of the evidence of Aegean civilization, Xootr, Occam's Razor
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