The authority on Polymer Sheeting & Rubber Products
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Cloudy effect or whitish powdery deposit on the surface of a solid rubber or plastic article caused by the exudation of a compounding ingredient such as a lubricant, stabiliser pigment, plasticiser, etc. often deliberately incorporated as an antitoxidant layer to the moulded part. This is a common effect on rubber sheeting and is easily removed by wiping.