| http://www.w3.org/ns/prov#value | - As an example, the liquid barrier layer can contain opacifying agents, e.g. TiO2, in order to provide a white, substantially opaque film. [0021] As indicated herein above, the cleaning sheets of the present invention are well suited for use with a variety of cleaning equipment and, more particularly, is readily capable of being releasably-attached to the head of a cleaning tool.
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