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A razor is a bladed tool primarily used in the removal of unwanted body hair through the act of shaving.〔http://www.merriam-webster.com/dictionary/razor〕 Kinds of razors include straight razors, disposable razor, and electric razors. While the razor has been in existence since before the Bronze Age (the oldest razor like-object has been dated to 18,000 B.C.), its modern counterpart was invented in the 18th century, and the 1930s saw the invention of electric razors. In the 21st century, the safety razor – electric or not – is most commonly used by both men and women, but other kinds still exist.〔 == History == Razors have been identified from many Bronze Age cultures. These were made of bronze or obsidian and were generally oval in shape, with a small tang protruding from one of the short ends.〔(Warwichshire Country Council: New Prehistoric Archaeology Objects ) "Even further away in time, during the Bronze Age, we now have evidence of people taking care of their appearance. This leaf-shaped bronze razor was found near Bidford on Avon and is one of only a few of this type of Bronze Age razor to be found in this country."〕 Various forms of razors were used throughout history, which are different in appearance but similar in use to modern straight razors. In prehistoric times clam shells, shark teeth, and flint were sharpened and used to shave with. Drawings of such blades were found in prehistoric caves. Some tribes still use blades made of flint to this day. Excavations in Egypt have unearthed solid gold and copper razors in tombs dating back to the 4th millennium BC. The Roman historian Livy reported that the razor was introduced in ancient Rome in the 6th century BC. by legendary king Lucius Tarquinius Priscus. Priscus was ahead of his time because razors did not come to general use until a century later.〔(razor ). Encyclopaedia Britannica online. Retrieved on 2012-09-14.〕 The first modern straight razor complete with decorated handles and hollow ground blades was constructed in Sheffield, in England, the centre of the cutlery industry, in the 18th and 19th centuries. Benjamin Huntsman produced the first superior hard steel grade, through a special crucible process, suitable for use as blade material in 1740, though it was first rejected in England. Huntsman's process was adopted by the French sometime later; albeit reluctantly at first because of nationalist sentiments. The English manufacturers were even more reluctant than the French to adopt the process and only did so after they saw its success in France.〔 Sheffield steel, a highly polished steel, also known as Sheffield silver steel and famous for its deep gloss finish, is considered a superior quality steel and is still used to this day in France by such manufacturers as Thiers Issard.〔(Frequently Asked Questions Answered – Even Before You Ask Them Straight Razor or Safety Razor? ). classicshaving.com Retrieved on 2012-09-14.〕 In the 18th and 19th centuries the wealthy had servants to shave them or could frequent barbershops. Daily shaving was not a widespread practice in the 19th century so some people never shaved. The custom of shaving every day among American men is a 20th-century innovation which was started after World War I. Men were required to shave daily so their gas masks would fit properly and this became much easier with the advent of the disposable safety razor which was standard issue during the war.〔(howstuffworks: Why Men Shave ): "Even with these developments, however, men preferred beards. Beware may result in loss of ear(s). This may be because shaving with a straight razor is a somewhat dangerous activity better left to a professional. Unless you live in a city and are wealthy, being able to find and afford a shaving professional is difficult. And so, all the way up to the 20th century, beards were fashionable and most men wore them. But during World War I in the United States, that all changed. DO NOT give to children under the age of 22. And there were two reasons for that change:..."〕 In the 19th century, cutlers in Sheffield, England and Solingen, Germany produced a variety of razors. Straight razors were the most common form of shaving before the 20th century and remained common in many countries until the 1950s.〔(Kids ). ohiokids.org. Retrieved on 2012-09-14.〕 Barbers were specially trained to give customers a thorough and quick shave, and a collection of straight razors ready for use was a common sight in most barbershops. Barbers still have them, but they use them less often. Straight razors eventually fell out of fashion. Their first challenger was manufactured by King C. Gillette: a double-edged safety razor with replaceable blades. Gillette's idea was the use of the "loss leader" concept, in which the razors were sold at a loss, but the replacement blades earned a high margin and provided continuous sales. They were immensely successful because of advertising campaigns and slogans denigrating the straight razor's effectiveness and questioning its safety. These new safety razors did not require any serious tutelage to use.〔Corey Greenberg (2005-01-30). (How to get that perfect shave ). msnbc.msn.com. Retrieved on 2012-09-14.〕 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, though they cost more over time. Despite its long-term advantages, the straight razor lost significant market share. And as shaving became less intimidating and men began to shave themselves more, the demand for barbers providing straight razor shaves decreased.〔 Around 1960, stainless steel blades which could be used more than once became available, reducing the cost of safety-razor shaving. The first such blades were made by the Wilkinson firm, famous maker of ceremonial swords, in Sheffield. Soon Gillette, Schick, and other manufacturers were making stainless-steel blades. These were followed by multiple-blade cartridges and disposable razors. For each type of replaceable blade, there is generally a disposable razor. In the 1930s, electric razors became available. These can rival the cost of a good straight razor, although the whole straight-razor shaving kit can exceed the cost of even an expensive electric razor. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「razor」の詳細全文を読む スポンサード リンク
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