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Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]
A sharp blade will have a distinct edge, like a corner, and may sing slightly from vibration, while a dull blade will have a round edge and the thumb will slip over it. A blade's sharpness may be tested by checking if it "bites"—begins to cut by being drawn across an object without pressure.
The origin of the name "Damascus Steel" is contentious. Islamic scholars al-Kindi (full name Abu Ya'qub ibn Ishaq al-Kindi, circa 800 CE – 873 CE) and al-Biruni (full name Abu al-Rayhan Muhammad ibn Ahmad al-Biruni, circa 973 CE – 1048 CE) both wrote about swords and steel made for swords, based on their surface appearance, geographical location of production or forging, or the name of the ...
Diamond knife blade. A diamond knife is a very sharp knife in which the edge is made from diamond, invented by Humberto Fernández-Morán in 1955. [1] [2] Diamond knives are used for medical and scientific applications where an extremely sharp and long-lasting edge is essential. The knives are very expensive to purchase, depending on the ...
The sword of Goujian is 55.6 centimetres (21.9 in) in length, including an 8.4 centimetres (3.3 in) hilt; the blade is 4.6 centimetres (1.8 in) wide at its base. The sword weighs 875 grams (30.9 oz). In addition to the repeating dark rhombi pattern on both sides of the blade, there are decorations of blue crystals and turquoise.
The debole, weak, is the part of the blade which includes the point and is the second half of the blade when the sword is divided into an even number of parts. However, some rapier masters divided the blade into three parts (or even a multiple of three), in which case the central third of the blade, between the forte and the debole, was often ...
A macuahuitl ([maːˈkʷawit͡ɬ]) is a weapon, a wooden sword with several embedded obsidian blades. The name is derived from the Nahuatl language and means "hand-wood". [2] Its sides are embedded with prismatic blades traditionally made from obsidian, which is capable of producing an edge sharper than high quality steel razor blades. The ...
Square, spike or sharp point, so-called because the blade profile is straight and terminates at a very sharp point at the toe, perpendicular to the cutting edge of the razor. This type of blade is used for precise shaving in small areas but, at the risk of pinching the skin, it requires some experience in handling. [ 45 ]