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The knife

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by

Gaël González Chrétien

on 15 October 2012

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Transcript of The knife

The name "knife" hasn't got any relationship
with its creator because this object is used
since the stone Age.
This product is know by its name but there are also famous brands. Its name is given by the product itself. These are the different parts of a knife: Here is a video of how to use a knife. If we reduce or increase the size of the knife, it´s
function remains the same but it will have different
uses. These are some of the different types of blades: About the cost to manufacture the product and how much will it sell for in the shops, it is impossible to know it because there is a huge range of knives in the world. The knife is an indispensable tool for every day life and
is used every time that something has to be cut.

It is used since the Stone Age when they were made of silex.

I think that the shape of the knife will remain the same in the future but it is possible that we will use more resistents materials. This are some silex that humans used at the Stone Age: Now you know a little bit more about
knives. I hope you enjoy this prezi. The knife The blade is what makes or breaks a knife. Depending on the material the blade is constructed of, there are advantages and drawbacks. The main materials are:

- The stainless steel: this blade is one of the most popular for knives because of its durability and resistance to corrosion. Stainless steel is a metal alloy generally made out of at least 11% chromium, iron, nickel, molybdenum and carbon.

- The carbon steel: before the popularity of stainless steel, carbon steel was used for most blades. Carbon steel blades are among the sharpest blades available and are much easier to sharpen than stainless steel blades. The lack of chromium in the blades means that it is highly susceptible to rust and corrosion and requires careful cleaning after each use. - The titanium: titanium is a very strong material that's rust-resistant and easy to tell apart from other blade types because of its dark, silver coloring. Titanium blades tend to be softer and not as sharp as other types, so they're sometimes coated with other material. The non-magnetic and durable properties of titanium makes these blades popular with diving knives, pocket knives and even bomb-defusing knives.

- Ceramic: ceramic blades are less common than the previous knife types and are mostly found in kitchen cutlery and pocket knives. The advantage of ceramic, which is a non-metallic solid, is its complete resistance to corrosion, extremely hard blade and ability to maintain sharpness for long time periods. Ceramic is very brittle and vulnerable to cracks if it's dropped, and these blades can only be sharpened with specific tools.

- Plastic: less common than ceramic, plastic blades are used mainly as disposable knives. Its difficulty to sharpen the edges of the blade requires most plastic blades to be serrated. An example of a plastic blade is a disposable plastic knife.
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