Fig. S3.

Numerical simulations of the deflection and the stiffness of the LDPE film. (A) Map of the film deflection ($w_f$) for a point load ($F=$ 12.8 μN) at its center. Only a quarter of the film domain has been modeled, due to the symmetry of the problem. (Inset) The modeled domain in relation to the total film area, along with the prescribed boundary conditions (hatched region). For the interior edges (dashed lines in Inset), symmetry boundary conditions were used. (B) LDPE film stiffness ($k$) vs. $w_f$ at the point where $F$ is applied (see A); $w_f$ is defined as zero when the film is in its equilibrium position while under the influence of the gravitational field.