A sheet assembly can be cut into one or more cards. The sheet assembly includes an upper sheet configured to receive a first printing of first indicia for the one or more cards, a polymer core coupled with the upper sheet, and a lower sheet configured to receive a second printing of second indicia for the one or more cards. The lower sheet is coupled with the polymer core with the polymer core disposed between the upper sheet and the lower sheet. The upper sheet, polymer core, and/or the lower sheet is or are formed from a polymer binder with inorganic particles dispersed in the polymer binder. The inorganic particles can have a first density of the inorganic particles that is less than four times a second density of the polymer binder and/or a mass-median-diameter (D50) of the inorganic particles can be larger than ten microns in size.