1. What is the difference between pressed oil and leached oil? What is the different processing technology The processing technology of pressed oil is "physical pressing method", while the processing technology of leached oil is "chemical leaching method". Different nutrients The pressed oil has the characteristics of complete color, fragrance and taste, and retains various nutrients; The leached oil is colorless and tasteless, and some nutrients are destroyed or removed after processing. The requirements of raw materials are different Taking peanut oil as an example, "mechanical pressing oil" retains its original taste because it adopts pure physical pressing method, so it has strict requirements on peanut raw materials, fresh raw materials, low acid value and peroxide value, so the price is relatively high; At the same time, because only pressing is carried out, the residual oil in the cake is high, and the oil yield of pressed oil is relatively low. Therefore, the price of pressing oil is relatively high. At present, there are two kinds of oil-making processes in China's edible oil market: leaching and pressing. Among them, more than 80% of edible oil manufacturers have adopted leaching method; Less than 20% of edible oil is squeezed. The price of edible oil produced by ordinary squeezing is about 30% higher than that produced by leaching, which is generally only sold in big supermarkets, but is difficult to find in small supermarkets. According to the relevant national standards for edible oil, it is required to mark "squeezing" or "leaching" on the label for the convenience of consumers.2. Is pressed oil healthier than leached oil? Most people think that "squeezed oil is a green and pure natural food, which is the healthiest; The leached oil is extracted by chemical method, which has chemical solvent residue and is unsafe. ". In fact, pressing method and leaching method are just two different oil preparation processes, and the different characteristics of oil raw materials determine different oil preparation processes. Generally speaking, high oil-bearing oils are extracted by pre-pressing, such as rapeseed. Low oil-bearing oil adopts direct leaching method; However, some oils can produce oils with special flavor. In order to keep their products from losing their original flavor, pressing methods are often adopted, such as sesame oil, peanut oil and other oils. Compared with pressing method, leaching method has less residual oil, makes full use of oil resources, and has high oil yield and low price. However, no matter what process is adopted, the oil obtained can only be crude oil (also called crude oil). Crude oil can not be eaten directly, and it needs to be refined to make it a light and clear refined oil. Only when it meets the standards of oil products at all levels can it be put on the market. Therefore, whether it is extracted oil or pressed oil, it is safe as long as it meets the quality and hygiene standards of edible oil in China.
