The difference of light transmittance has a good resolution to the quality deterioration of rice caused by aging and mildew, which can better reflect the aging degree of rice. With the extension of rice storage time, the difference of light transmittance of rice will be reduced to varying degrees.
Preservation method of rice:
Spread a layer of plant ash on the bottom of the rice jar (it is best to put plant ash in a gauze bag and put it at the bottom of the jar), then pour in the dried and blown rice, cover the rice jar tightly, and store it in a cool, dry and ventilated place for a long time.
Dried kelp has strong hygroscopicity, and has the functions of killing insects and inhibiting mold. When storing rice, rice and kelp are mixed at the ratio of 100 1. After about 10 days, take out the kelp and dry it thoroughly, and then put it back in the rice, so that it can be mildew-proof and insect-proof.