Abstract: A binding substrate comprising a substrate bearing on at least one major surface thereof a water receptive layer which comprises at least one polymer and an effective amount of an ink binding polymer that has an amino as well as a guanidine functional moiety incoporated in it. One such molecule that essentially has both the amino and guanidine moieties is polyaminopropyl biguanidine. The present invention describes the use of polyaminopropy biguandine in inkjet technology.