Aqueous compositions and inkjet receiving media

An inkjet receiving medium for use in high-speed inkjet printing processes when using aqueous pigment-based inks containing anionically-stabilized pigments, the inkjet receiving medium comprising:

• a substrate that is a transparent polyethylene terephthalate film, a transparent polypropylene film, or a metallized polyethylene terephthalate film, and
• a topcoat composition disposed on a surface thereof, wherein the disposed topcoat composition has a dry solids coating weight of at least 0.1 g/m2 and up to and including 2 g/m2, and the inkjet receiving medium has an opacity of at least 50% and a colorimetry defined by an a* value of at least −3 and up to and including +3 and a b* value of at least −3 and up to and including +3,
• wherein the disposed topcoat composition comprises the following (a), (b), and (c) components:
• (a) one or more water-soluble salts of a calcium or magnesium metal cation present in an amount of at least 4 weight % and up to and including 13 weight %;
• (b) one or more nonionic or cationic water-soluble or water-dispersible polymeric binder materials selected from a poly(vinyl alcohol), a polyethylene imine, a polyvinyl amine, and a polyurethane, or a mixture thereof, that are present in an amount of at least 10 weight % and up to and including 30 weight %;
• and
• (c) visible light-scattering titanium dioxide or zinc oxide particles that have been surface-treated using a (f) dispersing aid aids so that the (c) surface-treated visible-light scattering titanium dioxide or zinc oxide particles have a stable zeta potential of greater than +10 millivolts (mV), which (c) surface-treated visible light-scattering titanium dioxide or zinc oxide particles exhibit a D50 particle size of at least 0.04 μm and up to and including 2 μm, as measured by a particle analyzer providing a volume-weighted particle size distribution and are present in an amount of at least 15 weight % and up to and including 75 weight %,
• wherein the (f) dispersing aid is a protonated polyvinyl amine and is present in the topcoat composition in an amount of at least 0.5 weight % and up to and including 61.9 weight %, based on the total weight of the (c) surface-treated visible light-scattering titanium dioxide or zinc oxide particles, and
• wherein the amounts of the (a), (b), and (c) components are based on the total weight of the topcoat composition.