Patent ID: 7569255

Claim:
A method of manufacturing an inkjet-receiving medium comprising the steps of: (a) providing a support or intermediate material in the manufacture of the support; (b) treating the support or intermediate material with an aqueous solution of a water-soluble, essentially colorless, non-reactive salt of a multivalent metal cation; (c) coating upon one or each side of the treated support at least one porous ink-receiving layer, including a porous ink-receiving top layer, where each porous ink-receiving layer coated on the treated support is coated from an aqueous coating composition consisting essentially of non-cationic components, such that the aqueous coating composition is anionic at the coating pH; wherein non-cationic components comprise binder and anionic particles of average particle size less than 2.5 micrometers, and wherein the anionic particles comprise at least 50% of total solids by weight of the porous ink-receiving top layer, such that the water-soluble salt of a multivalent metal cation diffuses into the at least one porous ink-receiving layer; (d) drying the coating; and (e) optionally calendering the coating.