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Cross-Bladed Scissors

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by

Hannah Kennedy

on 21 December 2013

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Transcript of Cross-Bladed Scissors

History of scissors
The Romans invented the scissors that we know today
They were invented in 100 AD
Scissors used to be made of silver but now they are made of iron.
What Are Scissors Used For?
Cutting things like,
paper
cloth
thread
food
hair
ect.
Why These Materials Were Chosen for Scissors
Cross-Bladed Scissors
By Hannah Kennedy and Lauren Gilligan

January 2nd 2014

pd.3


Cross-Blade Scissors

Plastic
So your fingers don't hurt after use.

Iron
A strong material, so it cuts through most materials.

Major Materials of Scissors
Plastic is used in the making of scissors.
The handles of scissors are made of plastic.
Plastic is a mold-able material and is made of natural gases.
Iron is also used to build scissors.
The blades are made of iron and the screw is to hold them together.
Iron is a conductor, and it is a natural material.

Chemical and Physical Properties

Plastic
Melting point : 320 degrees F
Boiling point: 392 degrees F
Density: 1.18 g/cm
Color: varies
Iron
Melting point: 2,800 F
Boiling point: 5,184 F
Density: 7.86 g/cm
Color: silvery
Origin of Iron
Iron is the fourth most abundant element in the Earth's crust (5%)
It is found in China, Russia, Brazil, Canada, Australia, and India
Most commonly found in, China, Japan, United States, Russia, Germany, and Brazil.

Processes:
Iron ore is first crushed to make iron, then it is melted. lastly it is molded to its normal scissor shape.
Bibliography


Longstreth, Joel. "Is plastic made form oil? What is plastic made from?." Brentwood
Plastics. bpi, 01 May 2012. Web. 11 Dec 2013. <http:info.brentwoodplastics.com/blog/bid/125095/Is-plastic-from-oil-what-is-plastic-made-from>.



Welford, John. "History of Scissors and Shears." Humanities 360. RR Donnelley,
15 Jun 2008. Web. 11 Dec 2013. <http://www.humanities360.com/index.php
history-of-scissors-and-shears-53651/>.


Bentor, Yinon. Chemical Element.com - Iron. Dec. 20, 2013 <http:// www.chemicalelements.com/elements/fe.html>.


"IRON." Chemistry Explained. Advameg, inc., 14 Aug 2008. Web. 11 Dec 2013. <http://
www.chemicalelements.com/elements/ir.html>.

Brain, Marshall, and Robert Lamb. "How Iron and Steel Work." HowStuffWorks.
Howstuffworks, inc., 01 Nov 2012. Web. 20 Dec 2013. www.howstuffworks.com/iron3.htm>.

Saville, J.P. Iron and Steel. Sussex: Priory Press Limited, 1976. 8-83. Print.

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