Including hydration, bleaching, steam distillation , to remove predominantly hydrated phospholipids, pigments removed decolorization main steam distillation for removal of odor substances and free fatty acids. After crude oil refining treatment before consumption is seed oil press to the body , such as : eating raw crude cottonseed oil can cause damage to sperm cells , leading to testicular atrophy , no sperm production , resulting in infertility. Long-term consumption of large amounts of crude cottonseed oil , but also people suffering from sun disease , manifested symptoms of sun seizures , weakness or less sweat , skin burning, flushing, palpitation , shortness of breath , dizziness , numbness , loss of appetite . By refining , potato peeling machine , impurities, acid value, peroxide value of oil press are to meet quality standards prescribed by the State , and difficult to rancidity deterioration , while enabling the storage , does not produce a lot of smoke when cooking, keeping the fat flavor.