Abstract: The invention relates to a sheetlike composite comprising, as layers of a layer sequence, from an outer face of the sheetlike composite to an inner face of the sheetlike composite, a) an outer polymer layer comprising i) a polymer matrix, and ii) a multitude of inorganic particles; b) a carrier layer; c) a barrier layer; and d) an inner polymer layer; wherein the outer polymer layer superposed on the carrier layer is characterized by a reflectance for a reflection of light having a wavelength in a range from 600 to 800 nm in a range from 4% to 8%. The invention further relates to a container precursor and to a closed container comprising the sheetlike composite and to a method by which the sheetlike composite is obtainable, to a method by which a container is obtainable, and to a method by which a filled and closed container is obtainable, and to a use of the sheetlike composite.