Secret one: smell method. Bring the silicone rubber product close to your nose and smell it. The pungent smell is ordinary silicone rubber, and the opposite is food-grade silicone rubber. Ordinary silicone rubber has a pungent odor and is not environmentally friendly. Food-grade silicone rubber is non-toxic and tasteless, and belongs to environmentally friendly silicone rubber.

Secret Two: Pull hard. Take the silicone rubber tube as an example. Hold the two ends of the silicone rubber tube with your hands and pull it in the opposite direction. If you pull it white and you can smell the pungent smell, it means it is ordinary silicone rubber. On the contrary, it is food grade. Silicone Rubber. (Sometimes it won’t turn white when pulled up. Because the manufacturer produces by-products during the vulcanization process, there will be a faint odor, but it is also food-grade silicone rubber, which will not affect the product quality, and the odor can be Self-eliminated).

Secret three: baking method. Except for special silicone rubber, the temperature resistance of ordinary silicone rubber can only reach up to about 150 degrees, while the food grade silicone rubber can withstand high temperatures of 250 degrees, and the temperature can be as high as 350 degrees in a short time.

Secret four: require manufacturers or businesses to improve FDA food-grade certification.

Although manufacturers generally do not use ordinary silicone rubber as food-grade silicone rubber to fool customers, if we can learn how to identify food-grade silicone rubber, we will have our own distinguishing ability.