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Prismatic blade. In archaeology, a prismatic blade is a long, narrow, specialized stone flake tool with a sharp edge, like a small razor blade. [1] Prismatic blades are flaked from stone cores through pressure flaking or direct percussion. [2] This process results in a very standardized finished tool and waste assemblage.
Obsidian can be used to make extremely sharp knives, and obsidian blades are a type of glass knife made using naturally occurring obsidian instead of manufactured glass. Obsidian is used by some surgeons for scalpel blades, although this is not approved by the US Food and Drug Administration (FDA) for use on humans. [ 59 ]
The most common blade materials are carbon steel, stainless steel, tool steel, and alloy steel. Less common materials in blades include cobalt and titanium alloys, ceramic, obsidian, and plastic. The hardness of steel is usually stated as a number on the Rockwell C scale (HRC). The Rockwell scale is a hardness scale based on the resistance to ...
Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica. Obsidian was a highly integrated part of daily and ritual life, and its widespread and varied use may be a significant contributor to Mesoamerica's lack of metallurgy.
A knife wholesaler whose weapons have been used in several killings has surrendered more than 35,000 "zombie" blades. Police said the knives and machetes were designed to "kill and maim".
Texas at Michigan, Sept. 7. This is the biggest non-conference game of the year. Even if Michigan takes a step back as expected, the defending national champions could upend the early playoff ...
Paul recently said he would make $40 million from the fight, but Tyson downplayed the financial incentive. “This fight is not going to change my life financially enough,’’ Tyson said ...
Gerber Legendary Blades is an American maker of knives, multitools, and other tools for outdoors and military headquartered in Portland, Oregon. Gerber is owned by the Finnish outdoors products company Fiskars. Gerber was established in 1939 by Pete Gerber. Gerber is the "largest maker of knives and multi-tools for the United States armed ...
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