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This European Standard specifies a method for the determination of the staining tendency of bitumen. This method is applicable to bitumen having a Ring-and-Ball softening point greater than or equal to 80 °C. For softer bitumen, the test conditions may be modified by agreement between the involved parties. The procedure described in this document may be used to compare results against a material for which the staining tendency is known. NOTE Staining properties are related to the colloidal stability of the bitumen with higher values indicating lower stability. WARNING — The use of this standard can involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.