Read the following passage.
A: There is a wide range of 3D printing materials that are currently available in the industrial market and that is being developed for the consumer market. Here is an overview of 3D printing materials that are available across all 3D printing technologies, which include plastics, metals, ceramics and various other 3D materials.
Plastics / Polymers 3D Materials
Plastics or polymers are the most common type of 3D material used, especially for desktop 3D printers. Plastics are used by both industrial and consumer markets. In the consumer market, a desktop 3D printer heats the plastic filament to a temperature range of 320-482°F. The heated plastic is then extruded onto a print bed layer by layer until the 3D object is completed. The two most common types of plastics that are currently being used for desktop 3D printers are ABS and PLA. ABS and PLA have unique properties that provide advantages and disadvantages. ABS, petroleum-based plastic, is known to be a more durable and heat resistant plastic but gives off strong fumes when heated. On the contrary, PLA, a plant-based plastic, gives off less irritable fumes but has a lower melting and breaking point.
B: Metal 3D Materials
Other type of 3D material is metal. Using metal for 3D printing is relatively new and is gaining traction in many industries, including automotive and aerospace. To fabricate a metal 3D printed object, metal is typically heated by a laser and placed layer by layer. Types of metals available include steel, aluminum, and titanium. Precious metals are also being used as 3D materials, such as gold and silver.
C: Ceramic 3D Materials
Ceramics is another type of 3D material. Ceramic 3D printed objects are using droplets of liquid binder on top of a thin layer of ceramic powder, followed by another layer of ceramic powder. To finish a ceramic 3D printed object, a series of heat treatments are required to dry, fire, and glaze the 3D printed object.
D: Other 3D Materials
As 3D printing technology continues to expand and mature, more 3D materials will be available, including composites, paper, plaster, wood, organic (tissue/cells), nylon, food, and concrete. This list is sure to grow to include many more materials that can contribute to useful 3D printed objects.
E: Not given in any of the above paragraphs
Decide which paragraph, A to D, has the information given in each statement below. Select E if the information is not given in any of the paragraphs.
Glazing can be done on ceramics. 2.
Metals being used in the printing by heating. 3.
High precision laser is required to create polymers. 4.
Aerospace industry has started using 3D printing. 5.
Inclusion of more materials in printing technology. 6.
In the consumer market, a desktop 3D printer heats the plastic filament to a temperature range of 320-482°F. 7.
There are seven distinct types of 3D printing materials. 8.
The two most common types of plastics that are currently being used for desktop 3D printers are ABS and PLA. 9.