Easy way to filter out sesame debris

pu1. Sesame seeds contain more foreign substances than ordinary stones, but if you use a sieve that has a hole larger than sesame seeds, you can remove some of the bigger foreign substances

2017-12-16

OK

pu2. In addition to the story of the upper part, if you put sesame seeds in water, the sesame seeds are light, so they float in water, and if you scoop them out with a mesh like cooking, you can pick out heavy foreign substances. You can pick out rocks like this

2017-12-16

OK

pu3. The foreign substances in sesame seeds have similar weight and properties to sesame seeds, so it's hard to pick them out. There's no other way. Pick one by one. That's the answer

2017-12-16

OK