Aqueous ink receptive primer compositions and receiving media

An inkjet receiving medium comprising a water-absorptive substrate and an aqueous ink receptive primer composition disposed on a surface thereof, which disposed aqueous ink receptive primer composition comprises the following components (a), (b), and (c):

• (a) one or more water-soluble salts of a multivalent metal cation, which component (a) one or more water-soluble salts are present in a total amount of at least 20 weight % and up to and including 80 weight %;
• (b) one or more water-soluble or water-dispersible polymeric binder materials that are present in a total amount of at least 10 weight % and up to and including 40 weight %, each of which component (b) one or more water-soluble or water-dispersible polymeric binder materials has a weight average molecular weight (Mw) of at least 50,000 and up to and including 180,000;
• and
• (c) fluorine-free wax particles composed of a water-insoluble composite comprising a polymer selected from a polyalkylene, a polyester, or a polyimide, which polymer is homogeneously combined in the water-insoluble composite with an inorganic material selected from an oxide, a carbide, a carbonate, and a phosphate, which inorganic material has a mean particle size below 1000 nm, and which (c) fluorine-free wax particles are present in an amount of at least 2.5 weight % and up to and including 12 weight %, and
• wherein the amounts of the components (a), (b), and (c) are based on the total weight of the disposed aqueous ink receptive primer composition.

A method for providing an inkjet receiving medium comprising, in order the following Steps A and B:

• A) providing a water-absorptive substrate;
• and
• B) disposing an aqueous ink receptive primer composition onto at least one surface of the water-absorptive substrate, to provide an inkjet receiving medium having a disposed aqueous ink receptive primer composition on the at least one water-absorptive substrate surface, the disposed aqueous ink receptive primer composition comprising the following components (a), (b), and (c):
• (a) one or more water-soluble salts of a multivalent metal cation, which component (a) one or more water-soluble salts are present in a total amount of at least 20 weight % and up to and including 80 weight %;
• (b) one or more water-soluble or water-dispersible polymeric binder materials that are present in a total amount of at least 10 weight % and up to and including 40 weight %, each of which component (b) one or more water-soluble or water-dispersible polymeric binder materials has a weight average molecular weight (Mw) of at least 50,000 and up to and including 180,000;
• and
• (c) fluorine-free wax particles composed of a water-insoluble composite comprising a polymer selected from a polyalkylene, a polyester, or a polyimide, which polymer is homogeneously combined in the water-insoluble composite with an inorganic material selected from an oxide, a carbide, a carbonate, and a phosphate, which inorganic material has a mean particle size below 1000 nm, and which (c) fluorine-free wax particles are present in an amount of at least 2.5 weight % and up to and including 12 weight %, and
• wherein the amounts of the components (a), (b), and (c) are based on the total weight of the disposed aqueous ink receptive primer composition.