1. Golden yellow is better when viewed with the naked eye. If it is too light, it may be tea oil produced by chemical leaching. Some leached oils will add pigments to make the camellia oil look golden and translucent, or they may be blended. The color of camellia oil will also appear golden. In this case, you need to identify it through other methods. If it is too dark, it may be unrefined crude oil, which will affect the quality of camellia oil.

2. Smell a few drops of tea oil and rub it in the palm of your hand to warm it, and smell it closely. Pure tea oil should have a unique and comfortable tea oil aroma; on the contrary, if you smell other more irritating smells, It means there is a problem with the quality of the oil; you can also smell carefully whether there is any smell of other oils in the oil. If there is any smell, it is undoubtedly blended with tea oil.

3. Take an appropriate amount of tea oil orally. If the taste is smooth and the fragrance of tea oil stays in the throat, it is pure tea oil. On the contrary, if the entrance feels greasy, has sour, bitter and other odors, and is accompanied by a little nausea. , it means there is a problem with the quality of the oil.

4. Pure tea oil is moist but not greasy, and can be quickly absorbed when applied to the skin. The faster it is absorbed on the skin surface, the higher the purity. The purity of crude oil and blended tea oil is lower, so it is better to apply it on the skin. It is not easily absorbed and creates a greasy feeling.

5. Listen for one or two drops of oil, apply it on a piece of flammable paper and ignite it: it burns normally without any abnormal sound, and it is a qualified product. If it burns abnormally and makes a "squeaking" sound, or if it makes a "bumping" explosion sound when burning, it means that the moisture content is seriously excessive, and it is likely to be unrefined soil-pressed tea oil.

Extended information

1. The lower the acid price, the better. Good quality companies control it within 0.15, and ordinary companies control it within 1.0 (ranked to fourth grade oil abroad). If the oil you purchased opens and rubs with the palm of your hand or has a sour smell when heated in the pot, it means that the oil is of poor quality. Good quality oil Even if the heating temperature reaches more than 200 degrees, there will be no sour taste.

2. Peroxide value: the lower, the better. The lower the index, the lower the degree of oxidation.

3. Color: The country does not have high requirements for color, and in consumer misunderstandings, everyone thinks that oil with darker color is more authentic. In fact, this is not the case. Only good raw oil can be processed into colorless cosmetics. Oils, medical oils and high-end cold edible tea oils, generally speaking, are dark in color and are probably processed from the crude oil extracted (leached) from the cake.

4. Solvent residue: The solvent is tea There is no doubt that the high solvent (n-hexane) content in the cake after extracting oil is harmful to health, so the national regulations are very strict, 10PPM (that is, within 10 parts per million), Japan and South Korea require it to be within 1PPM. If the oil you bought has a pungent smell after being put into the pot, it is likely that this indicator exceeds the standard.

5. Smoke point: The higher the smoke point, the higher the quality of the oil. The smoke point is what we usually understand as the temperature at which oil smokes during the heating process. This is especially true when oil is placed in a pot, especially when the heating temperature is high. You can judge when the time comes.

6. Precipitated substances: The country has formulated the freezing test indicator in the standard to control the sediment content. Most of the precipitated substances are saturated acid oil, impurities, oxidized oil, moisture, and soap. (equivalent to household soap), obviously these substances are not good for the body. In winter, when the temperature is low, more sediments indicate relatively poor oil quality, while less or no sedimentation indicates good oil quality.

Baidu Encyclopedia-Camellia Oil