Color  discrimination method: pure sesame oil is red or orange red, machine  sesame oil is lighter than small sesame oil, sesame oil is dark yellow  when mixed with rapeseed oil, and dark red when mixed with cottonseed  oil. Binzhou City Shermark Sesame Oil Technology Co.,Ltd. specializes in producing 100% pure red sesame oil.

       Water  test method: use a chopstick to drip a drop of sesame oil onto a calm,  cool water surface. Pure sesame oil will show a thin, large oily flower  with no color and transparency. Oils mixed with sesame oil are small and thick, and are not easily diffused. [2]  It has been verified that this method distinguishes pure sesame oil and  blends sesame oil. The water temperature plays a decisive role. The  cold water is not scattered and cannot be distinguished. Both warm water  and water are scattered, but the shape and size of the oil flower are  inconsistent.
      Sniffing  method: Small grinding sesame oil is mellow, rich and unique. If it is  blended with peanut oil, soybean oil, refined oil, rapeseed oil, etc.,  it will not only have poor aroma, but also have other odors such as  peanuts and soybean meal. Some sesame oils are blended with food flavors and have a poor sense of smell.
      Consumers can also identify the following aspects when purchasing sesame oil:
A look at the color: pure sesame oil is light red or red with yellow, if mixed with other oil, the color is different. The rapeseed oil is dark yellow and the cottonseed oil is black and red. For  products with other vegetable oils, the water test method can also be  used: a drop of sesame oil is dropped onto the calm water with  chopsticks, and the pure sesame oil will show a thin, large oily flower  with no color and transparency. Smaller oily flowers.
      Second, look at transparency: generally good quality sesame oil has good transparency and no turbidity.
      Third, see if there is any sediment: good quality, no precipitation and suspended matter, and low viscosity.
       Fourth,  see if there is stratification: sesame oil is quite sensitive to  temperature, so it is possible to stratify at lower temperatures. If  there is stratification at normal temperature and there is no  significant increase in viscosity at 0 °C (the national standard is 5.5  when the freezing test is performed at zero degrees Celsius, it is not  allowed to freeze). If it is not condensed, it is likely to be  adulterated mixed oil. If there is no delamination at any temperature, it means that antifreeze additive is added to the sesame oil.
      Fifth  investigations: It is necessary to carefully check the trademarks, pay  attention to the shelf life and the ex-factory period, and have no  special name for the factory name, factory address or quality standard. Pay particular attention to the ingredients or ingredients (the words are specially formulated in lower case).
      Sixth  look at the price: refer to the price of sesame, generally 2.5 to 3  pounds of sesame seeds a pound of sesame oil, the price is too low is  the fake sesame oil blended with flavor!