Fruit fresh-keeping film

1. Production method of fresh-keeping film: take 97 parts of sodium sulfate or potassium sulfate, 1 part of starch or gelatin, 1 part of calcium stearate and 1 part of stearic acid. Mix and smash these raw materials (sold in chemical reagent shops), add a small amount of water and make them into dough. Into the film made of flake, that is, fresh film, each piece can be about 0.5 grams weight. 2. How to use: Keep the fresh-keeping piece wrapped in paper and evenly disperse it in the container for storing fruit. Generally, 5 tablets of apple, citrus and pear are used per kilogram, and 8 to 10 tablets per kilogram of grapes can be used to safely store these fruits for about 4 months. Storage environment should also maintain a certain degree of humidity in order to enhance the preservation effect.

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