Unverified85% confidenceFactTime unknown
食品级硅胶经拉扯测试真伪：撕拉后不变色、按压回弹快为纯硅胶；碳酸钙掺假品拉伸处会发白，可作为现场简易辨别方法
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Unverified硅胶玩具应做撕拉测试与拉伸回弹测试：真食品级硅胶被拉伸后表面无白痕（发白说明填充碳酸钙等劣质料），回弹迅速无粘手感，劣质硅胶拉伸易变形留印88% similarUnverified食品级铂金硅胶通过拉伸测试不发白、无异味，普通硅胶折叠处会泛白，选购硅胶蒸格可通过对折检验判断材质等级87% similarUnverified判断硅胶纯度可用'白痕测试'：用力拉扯或扭折模具，出现白色折痕说明填充了碳酸钙等杂质，纯硅胶扭折后不变色86% similarUnverified硅胶折叠洗菜盆需认准食品级铂金硅胶，闻起来无刺鼻味、折叠回弹快无白痕；廉价PVC冒充硅胶的产品受热易析出增塑剂，折弯出现白色折痕即为劣质料86% similarUnverified食品级铂金硅胶做扭曲测试不发白、无析出物；普通硅胶弯折处会泛白，出现白痕说明含填料，长期接触食材不安全85% similar
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