Because jelly shoes are a kind of shoes made by utilizing PVC and plastic materials, the type of shoes has slippers and sandals. The yellowing of PVC profiles or pipes is mostly caused by the decomposition of aging.PVC decomposition occurs when dehydrochlorination reaction to form *** yoke polyolefin series, this *** yoke polyolefin series is yellow, making PVC products no longer look so white, so the inside of the jelly shoes will turn black.

-There are a lot of plasticizers added to the shoes (generally 60-100PHR), and the liquid plasticizers (especially chlorinated paraffin, liquid paraffin, white oil, etc.) do not have good compatibility with PVC, and they can easily precipitate out to the surface of the shoes when the temperature rises, resulting in the yellowing of the soles.

The solution for the discoloration of jelly shoes:

You can pour a little Bass disinfectant when washing shoes, and then drop 3-5 drops of pure blue ink, add laundry detergent, stir the water well and soak the shoes in it for 10-15 minutes, and then brush the shoes, rinse them with clean water and put them in the shade (a place where the sun does not shine), or wrap them with tissue paper on the shoes and put them under the sun, but always remember to keep the shoes clean, so that they will not turn yellow. The bottom, but must remember to wrap the shoes tightly, and finally dry the shoes on it.