A method for preparing an opacifying article, the method comprising: providing an aqueous formulation comprising: at least 5 weight % and up to and including 50 weight % of porous particles, each porous particle comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase, the porous particles having a mode particle size of at least 2 μm and up to and including 50 μm and a porosity of at least 20 volume % and up to and including 70 volume %, at least 10 weight % and up to and including 50 weight % of a binder material; and optionally, at least 0.001 weight % and up to and including 0.5 weight % of one or more opacifying colorants, each of which is capable of absorbing electromagnetic radiation having a wavelength of at least 380 nm and up to and including 800 nm, all amounts being based on the total weight of the aqueous formulation; coating the aqueous formulation on a first opposing surface of a polymeric film substrate that is suitable for lamination; drying and optionally curing the coating of the aqueous formulation to provide a dry opacifying layer on the polymeric film substrate, and thereby forming a dry opacifying element, which dry opacifying layer having an outer surface and comprising: (a) at least 40 weight % and up to and including 90 weight % of the porous particles; (b) at least 10 weight % and up to and including 60 weight % of the binder material; and (c) optionally, at least 0.001 weight % of the one or more opacifying colorants, the amounts of (a) porous particles, (b) binder material, and (c) one or more opacifying colorants being based on the total weight of the dry opacifying layer; and laminating the dry opacifying element to the back side of a fabric to form the opacifying article. providing an aqueous formulation comprising: at least 5 weight % and up to and including 50 weight % of porous particles, each porous particle comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase, the porous particles having a mode particle size of at least 2 μm and up to and including 50 μm and a porosity of at least 20 volume % and up to and including 70 volume %, at least 10 weight % and up to and including 50 weight % of a binder material; and optionally, at least 0.001 weight % and up to and including 0.5 weight % of one or more opacifying colorants, each of which is capable of absorbing electromagnetic radiation having a wavelength of at least 380 nm and up to and including 800 nm, all amounts being based on the total weight of the aqueous formulation; at least 5 weight % and up to and including 50 weight % of porous particles, each porous particle comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase, the porous particles having a mode particle size of at least 2 μm and up to and including 50 μm and a porosity of at least 20 volume % and up to and including 70 volume %, at least 10 weight % and up to and including 50 weight % of a binder material; and optionally, at least 0.001 weight % and up to and including 0.5 weight % of one or more opacifying colorants, each of which is capable of absorbing electromagnetic radiation having a wavelength of at least 380 nm and up to and including 800 nm, all amounts being based on the total weight of the aqueous formulation; coating the aqueous formulation on a first opposing surface of a polymeric film substrate that is suitable for lamination; drying and optionally curing the coating of the aqueous formulation to provide a dry opacifying layer on the polymeric film substrate, and thereby forming a dry opacifying element, which dry opacifying layer having an outer surface and comprising: (a) at least 40 weight % and up to and including 90 weight % of the porous particles; (b) at least 10 weight % and up to and including 60 weight % of the binder material; and (c) optionally, at least 0.001 weight % of the one or more opacifying colorants, (a) at least 40 weight % and up to and including 90 weight % of the porous particles; (b) at least 10 weight % and up to and including 60 weight % of the binder material; and (c) optionally, at least 0.001 weight % of the one or more opacifying colorants, the amounts of (a) porous particles, (b) binder material, and (c) one or more opacifying colorants being based on the total weight of the dry opacifying layer; and laminating the dry opacifying element to the back side of a fabric to form the opacifying article.