This invention relates to labels. In one embodiment, the labels comprise a
polymer facestock layer, a nano-porous layer underlying the facestock,
and a metal layer overlying the facestock or underlying the facestock
between the facestock and the nano-porous layer. In another embodiment,
the labels also comprise a water-based adhesive in contact with the lower
surface of the nano-porous layer. These labels can be bonded to
substrates of glass, plastic, or metal using a water based adhesive which
is in contact with the nano-porous layer.