Lightweight multilayer foam film with enhanced perceived surface whiteness

A coextruded lightweight opaque multilayer thermoplastic film, comprising:

• at least one foam layer comprising a plurality of cells, wherein at least 10% of the cells are closed cells, an average cell size of 10 to 100 μm, and a cell density of 102 to 109 cells/cm3;
• and
• solid skin layers comprising a white solid skin layer on a side of the at least one foam layer and a darker non-white solid skin layer on an opposing side of the at least one foam layer, the white solid skin layer containing white pigment in an amount of less than 1 percent by weight and the darker non-white solid skin layer containing darker non-white pigment,
• wherein the multilayer film has an overall thickness equal to or greater than 1 mil and a film density from 0.1 to 0.9 g/cm3, and
• wherein the multilayer film has a skin layer whiteness index value of greater than 80 according to ASTM E313-73, a skin layer tint value of less than 1 according to ASTM E313-73, and a skin layer lightness value (L*) of greater than 90 in CIE L*a*b* dimension according to ASTM E308.