Pretreatment of raw material for the press to distinguish
Pretreatment of raw materials from the press to distinguish between cold pressing and hot pressing method, also called cooked pressing method. Cold-pressed is raw or roasted without steaming directly into the raw material oil press squeezed out of oil, this method is relatively shallow oil color, the color is more bright, but the oil is low, and the oil equipment not taste strong, mellow . The cooked virgin oil crops in the press should elapse before drying, the purpose is to reduce the moisture content of raw materials, increased fat molecule activity and mobility, thereby improving oil yield, oil quality assurance oil refinery . But also undermines the oil chemical tissue components, resulting in oil darker, more black.