The images of a "good" and "bad" bandage are shown below. These are reliably representative of the appearance of several such bandages tested. The data is shown as the reflectivity of intensity (I) on a log scale, indicated by the colorbar, where reflectivity from a mirror defines unity (1 = 100):

signal = log10(I)

"Good" bandage.
Note the porous appearance of the surface layer due to the vertical orientation of lamina. Light enters from below. Glass/air interface of glass coverslip is visible at bottom of images (a bit saturated). Bandage is positioned above the glass coverslip.

"Bad" bandage.
Note the continous strongly reflective layer near the surface (at z ≈ 450-500 μm), which indicates a horizontal lamina that seals the surface and prevents the bandage from absorbing blood and adhering to the wound.

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