To tell the truth it is the plantation of the rubber tree in Vietnam. Most rubber goods which exist in society are born from the resin of these trees. Of course, when the rubber of the tire and the shoes of the car from this resin, with you think, it is the strange feeling. Every morning, several hours between 10 o’clock, these trees produce the resin from 5 o’clock. This resin in order not to solidify, is mixed with ammonia and is brought to the nearby fabrication plant. And this as for the resin which was brought the lump of the natural rubber which becomes the cause of the rubber goods and shape is changed into the latex which can raise the density of the resin. The lump of this natural rubber after that to be mixed with the chemicals, the synthetic rubber (シンセテックゴム) as it is born as all rubber goods and changes. On the one hand as for the latex, being something which raises the density of the natural resin.