Silicone products and plastic and rubber products in general will slowly become yellow, hard, brittle and other aging phenomena as the use of time increases, which is an irreversible process. The following Cushwa electronic technology to explain why the silicone protective cover will become yellow?

First, rubber generally has vulcanized inside, with a long time, the vulcanized material is oxidized, and then it becomes yellow.

Second, plastic rubber yellowing is one of their basic characteristics, yellowing for many reasons, but one of the most important reason is the impact of ultraviolet light, in the process of use, the sun, light will produce ultraviolet light, ultraviolet radiation plastic to make it yellow, but the yellowing does not affect its basic characteristics such as hardness, life, etc..

Third, if the yellowing is due to tea, coffee or other stains, available stain removal solution or bleach treatment. If it is caused by the above-mentioned use time, you can consider changing another one. General cell phone silicone products become yellow, only the surface of that layer becomes yellow, cell phone stores can buy organic solvents, or scrub two or three times with the type of oil removal cleanser to remove the surface layer of silicone.