3D printer

1. The advantages of 3D printers

1.1. increase innovation

1.2. improve communication

1.3. speed time in market

1.4. reduce developmental cost

1.5. better designs for the products

1.6. tailor-made the products for customers

2. The materials for making products

2.1. Metals

2.1.1. aluminum

2.1.2. steel

2.1.3. titanium

2.1.4. gold

2.2. Plastic

2.3. Glass

2.4. Nylon

2.5. Ceramic

3. The person who invented 3D printer

3.1. Name: Chuck Hull

3.1.1. occupation : executive vice president and chief technology officer of 3D Systems

3.1.2. the inventor of the solid imaging process

4. The uses of 3D printers

4.1. From the medical aspects

4.1.1. Printing blood vessels & heart tissue

4.1.2. printing skin

4.1.3. Patching a broken heart

4.1.4. Printing cartilage & bone

4.1.5. Studying cancer with printed cells

4.1.6. printing human embryonic stem cells

4.2. From the fashion aspects

4.2.1. printing clothing

4.3. From the music aspects

4.3.1. printing guitar

4.4. For the superior goods

4.4.1. printing cars

4.4.2. printing jewellery

4.5. For the food

4.5.1. printing chocolates

5. The disadvantages of 3D printers

5.1. The size of the products is usually small

5.2. Limited options for choosing the materials

5.3. May lead to unemployment

5.4. More technical jobs are needed

6. The costs of 3D printers

6.1. Home Use

6.1.1. less than US$500

6.2. Commercial and Industrial Use

6.2.1. around US$10,000-$20,000

6.2.2. some even cost US$50,000