1. Collecting Latex from a Rubber Tree Natural rubber production begins with the collection of latex, a milky white substance produced by the cells of several plants. Through an initial cut and selective removal of bark, a rubber tree will yield approximately 1.8 kg (about 4 lb) of dry crude rubber annually.

2. Rubber Production Producing rubber involves several stages. Workers on a plantation begin by drawing latex from trees in a method called tapping. Once the milky liquid latex is tapped and collected, it is placed in a treatment tank where the liquid will begin to gel, or coagulate, into a more solid form. Then, in a roller mill, the gel is pressed into sheets called crepe. Finally, the rubber is smoked, dried, and baled for shipping to manufacturers.

3. Natural Fiber

4. Spider

5. MDF

6. Bakelite( 최초의 플라스틱 )

7. Plastics

8. Liquid Crystal

9. Nematic structure Figure 1. Nematic structure with the director indicated by an arrow Figure 2. Polarized photomicrograph : Schlieren texture Figure 3. Polarized photomicrograph : Schlieren texture

10. Smectic structure Figure 1. Smectic A (left), smectic C (right) Figure 2. Smectic : focal-conic fan texture

11. Adhesives