| http://www.w3.org/ns/prov#value | - Non-limiting examples of suitable stiffening materials that are absorbent include cardboard, PVA foams, and waddings; non-limiting examples of suitable non-absorbent stiffening layers include as polyethylene, polypropylene and polyester films and mixtures thereof, rigid foams, rubber, wood, industrial non-wovens such as Type??? and the like.
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