| http://www.w3.org/ns/prov#value | - The inventive idea thus lies in the feature that the dispersing agent, which normally, e.g. as in the case of the AS-3-acid type disclosed in GB No. 1 415 949 is only linked to one OH group of the magnetic pigment (for example FeOx) through its SO3 H group, now contains in addition one or more reactive groups, e.g. NH or OH, which link the dispersing agent to reactive groups of the polymeric binde
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