A safety razor is a shaver with a protective device positioned between the edge of the blade and the skin. The initial goal of this protective device is to reduce the skill level required to shave injury-free, thereby reducing the reliance on professional barbers. The term was first used in a patent issued in 1880, for a razor in a basic contemporary configuration with a handle attached at right angles to the head where a detachable blade is placed (although this form precedes the patent).
Razors and disposable plastic razors with replaceable blade attachments are commonly used today. Razors usually include one to five spearheads.
Video Safety razor
History
Initial design
The basic form of the razor, "the cutting knife in the right hand corner with a grip, and resembling a common hoe", was first described in the patent application in 1847 by William S. Henson. It also includes a "toothbrush or protective comb" which can be fitted either to a conventional straight shackle and razor blade.
The first proven use of the term "safe razor" is in a patent application for "new and useful improvements in Safety-Razor", filed in May 1880 by Frederic and Otto Kampfe of Brooklyn, New York, and issued the following month. This is different from Henson's design in keeping the knife away from the handle by interposing, "hollow metal blade holder that has a more easily removable handle and a flat plate in front, attached by a clip and a pivoted catch, says the plate has a bar or a tooth at the bottom , and the bottom plate has a hole, for the purpose set ", that is, to" insure the fine bearing for the plate on the skin, while the tooth or grating will produce enough to allow the razor to cut hair without harm of cutting the skin. "The Kampfe Brothers produces knives shaving in their own name after the 1880 patent and refining the design in the next set of patents. These models are manufactured under the brand "Star Safety Razor".
The third most important innovation was a safety razor using a disposable two-sided knife so King Camp Gillette applied for a patent for 1901 and awarded in 1904. The success of Gillette's invention was largely the result of a contract award to supply American troops in World War I with safety razors multiply as part of their standard field equipment (providing a total of 3.5 million razors and 32 million blades for them). Retired soldiers are allowed to keep their piece of equipment and therefore easily defend their new shaving habits. Subsequent consumer demand for replacement knives put the shaving industry on the path to its present form with Gillette as the dominant force. Before the introduction of disposable knives, safe razor users are still needed to tighten and sharpen the edges of their knives. This is not a trivial skill (sharpening is often left behind for a professional) and remains a barrier to the ubiquitous adoption of being your ideal barber.
One-sided razor
The first safety razor uses a one-sided blade which is basically a 4 cm long segment of straight razor. A flat blade that can be used interchangeably with this "wedge" was first illustrated in a patent issued in 1878, serving as a prototype close to a one-edge blade in its present form. A new single razor was developed and used side by side with multiple razors for decades. The biggest producers are American Safety Razor Company with "Ever-Ready" series, and Gem Cutlery Company with "Gem" model. Although this one-sided razor brand is no longer produced, they are already available in antique trading, and compatible modern designs are being made. Blades for them are still produced both for shaving and technical purposes.
The second popular single edge design is the "Injector" razor that was developed and placed on the market by Schick Razors in the 1920s. It uses a narrow strip stored in the injector device that is inserted directly into the razor, so users do not have to handle the blades. The injector blade is the first to depart from the rectangular dimensions shared by wedges, standard one-sided blades, and double-sided edges. The injector itself, also the first device intended to reduce the risk of injury due to knife handle. The Gillette knife dispenser released in 1947 had the same purpose. The narrow injector blades, as well as the shape of the injector razor, also greatly affect the associated detail of the next developed cartridge razor. Both the injector blades and the injector safety razors are still available in the market, from antique stocks as well as modern manufacturing. The injector bar also has inspired a variety of special knives for professional barber use, some of which have been re-adopted for shaving by modern designs.
Until the 1960s, razors were made of carbon steel. It tends to rust unless the user is drained and often left out to frequently replace the blades. In 1965, the British company Wilkinson Sword began selling knives made of stainless steel, which did not rust and could be used until dull. Wilkinson quickly seized the US, UK, and European markets. As a result, American Safety Razor, Gillette and Schick are encouraged to produce stainless steel knives to compete. Currently, almost all razors are stainless steel even though carbon steel blades remain in limited production for low-income markets. Because Gillette holds a patent on a stainless knife but does not act on it, the company is accused of exploiting customers by forcing them to buy rust-prone knives.
The risk of injury due to razor handling was further reduced in 1970 when Wilkinson released the "Bonded Shaving System", which pinned a single blade in a disposable polymer plastic cartridge. The busy competing model soon followed with everything from one to six blades, with many razor blades also having disposable grip. Razor blades are sometimes considered to be their own common category and not a variety of safety razors. The similarity between a single-sided razor and a classic razor blade, however, provides the same justification for treating the two categories closely.
In 1974, Bic introduced a disposable razor. Instead of being a razor with a disposable knife, the entire razor is made for disposal. Gillette's response was a disposable Good News razor launched in the US market in 1976 before a disposable Bic was available in that market. Soon, Gillette modified the Good News construction to add a piece of aloe vera over the razor, producing Good News Plus. The recognized benefit of aloe vera is to reduce the discomfort felt on the face when shaving.
In a direct response to the Bonded Wilkinson cartridge, during the following year Gillette introduced the twin-knife Trac II. They claim that research shows tandem action from two blades to provide a closer shear than a single blade, due to the "hysteresis" effect. In addition to the first cutting action of the blade, it should also pull hair out of the follicle where it is not completely pulled back before the second blade cuts further. The extent to which these practical consequences, however, have been questioned.
Recent changes
Gillette introduced the first three-blade razor blade, Mach3, in 1998, and then upgraded the Sensor cartridge to Sensor3 by adding a third blade. Schick/Wilkinson responded to Mach3 with Quattro, the first four-blade razor blades. These innovations are marketed with the message that they help consumers achieve the best possible shave as easily as possible. Another impetus for the sale of multi-blade cartridges is that they have high profit margins. With manufacturers often updating their shaving systems, consumers can become locked in buying their proprietary cartridges, as long as manufacturers continue to make them. After introducing Mach3 at a higher price in 1998, Gillette's blade sales realized a 50% increase, and profits rose in an otherwise mature market.
The increasing number of marketing blades in cartridges has been parodied since the 1970s. The inaugural episode of Saturday Night Live in 1975 included a parody ad for Triple Trac Razor, shortly after the first two-blade cartridge for the advertised razor. Magazine Mad announced "Trac 76", which is organized as a chain of cartridges with a handle at each end. In the early 1990s, the Late Show (Australia) sketched "Gillette 3000" with 16 blades and 75 lubricant strips when it arrived in collaboration with the help of NASA scientists - "The first bar distracts the hair...". In 2004, a satirical article in The Onion, entitled "Fuck Everything, We Areing Five Blades" predicted the release of five blades, two years before their commercial introduction. South Korean manufacturer Dorco released their own six-blade cartridge in 2012, and then released a seven-blade cartridge.
Gillette has also produced Mach3 engine variants (M3Power, M3Power Nitro) and Fusion (Fusion Power and Fusion Power Phantom). The razor receives a single AAA battery used to produce vibrations in a razor blade; this action is said to lift the hair and away from the skin before it is cut. These claims are ruled in American courts as "baseless and inaccurate".
Maps Safety razor
Design
The safety razor initially has a edge that is protected by a patterned comb on various types of protective guards that have been affixed to a straight razor blade open for decades before.
Age
Disposable safety razors can be sharpened using a variety of methods. There are commercial devices intended for this task (Razormate, RazorPit, Blade Buddy, etc.).
The life safety of the razor can be extended by drying the blades after use.
Razor blades can be moved using old jeans.
Myths claim that it is possible to hone a disposable razor by utilizing the pyramid but this is pseudoscience.
Variant
Double-edged Razors
Double-sided safety razors (DE) remain a popular alternative to exclusive cartridge shavers, and typically offer a much lower total cost of ownership because they are not marketed under "business models of razors and blades". DE shaver is still designed and manufactured in many countries. The better known manufacturers include Edwin Jagger, Feather, iKon, Lord, Merkur, MÃÆ'¼hle, Parker, Rockwell, ShaveCraft, Van der Hagen, Weishi and Wilkinson Sword, with some producing razors marketed under other brands. Often various models of razors in one brand have the same razor head design, differing mainly in color, length, texture, material, and weight of handles. The three-piece razors generally have a replaceable handle, and some companies specialize in the manufacture of special or high-end replacement grips. Variations in the razor head design include straight safety bar (SB), open comb comb (OC) (toothed), adjustable razor, and tilt razor. The oblique bar is a common design in Germany where the blade is slightly tilted and curved along its length to make a slicing action and a more rigid spear tip.
The main functional difference between a double-edge razor and a modern cartridge shaver is that DE razor heads come in varying degrees of aggression (where aggression is usually defined as less protection than a blade).
References
Source of the article : Wikipedia
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