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Question:

White plastic products used for a long time and yellow, how do?

White plastic products used for a long time and yellow, how do?

Answer:

There is a plastic yellow removal agent on the market. Its principle is to dissolve, remove the surface layer, and then cover a new layer of plastic, adding antioxidants to prolong the oxidation time. When the antioxidants are exhausted, the plastic will slowly turn yellow. But you can try.
Yellowing time is not long plastic, you can use detergent powder scrub. It would be better to remove the yellowing layer on the surface. If all has been yellowed, yellowing of the product is generally unable to reply to the original white.
Generally white white plastic in the injection molding to add whitening powder material, so that after the injection molding products will be white jade. After a period of time, the whitening powder will lose whitening effect under the action of sunlight, so it will make the product yellow.

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