The present invention provides a method for positive product identification using tagging materials such as barium sulfate, manganese dioxide or mixtures thereof. Such materials may be employed, for example, in the dusting agent used in roofing materials, and applied to one or both sides of rubber roofing sheeting or admixed with the compounding ingredients during the preparation of the sheeting composition. The tagging materials can be detected and identified in the finished product by X-ray fluorescence spectroscopy.
                            本发明提供了一种使用
硫酸钡、
二氧化锰或其混合物等标记材料对产品进行正面识别的方法。这些材料可用于屋顶材料中使用的除尘剂等,并应用于屋顶橡胶板的一面或两面,或在制备橡胶板组合物时与混合物成分混合。可通过 X 射线荧光光谱法检测和识别成品中的标记材料。