Wood and bamboo have a lot of people think that disposable chopsticks more hygienic, safe, so go out to eat only willing to use disposable chopsticks, not knowing that some poor processing of disposable chopsticks because of the retention of "whitening" of sulfur dioxide, its harm is far greater than Sterile non-disposable cutlery. Regular manufacturers to produce disposable chopsticks used in the raw materials are better texture of the wood, without special processing. But some small workshops in order to reduce costs, the use of low-quality wood, looks "color" is more black, to the chopsticks "whitening", some criminals will use sulfur fumigation bleach. After sulfur gas bleaching, will produce a large number of sulfur dioxide components, and sulfur dioxide will be cold in the cold. Therefore, with this chopstick meal, sulfur dioxide with the flow of air is easy to solidification to the respiratory tract, leading to cough, asthma and other diseases.