The present invention addresses the problem of enhancing laminate strength or anti-blocking suitability of a printed matter obtained by printing of an aqueous white inkjet ink composition containing titanium oxide or the like on a polyethylene terephthalate, polypropylene, nylon, or other resin film. As a means for addressing this problem, the present invention provides an ink set including a combination of an aqueous primer composition containing a calcium salt and an acrylic resin and/or a vinyl acetate resin, and an aqueous white inkjet ink composition containing titanium oxide, a wax emulsion, and 0.1-10.0% by mass in terms of solid content of a polyester-based polyurethane resin emulsion having an elongation percentage of 500-1500% in the aqueous white inkjet ink composition.
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