| http://www.w3.org/ns/prov#value | - The non-ionic surfactant in accordance with the present invention is a non-ionic surfactant having at least one hydroxyl group, and examples of such a surfactant include polyoxyethylene (hereinafter referred to as POE) alkyl (C6 -C22) ethers, POE alkyl (C4 -C18) phenol ethers, polyoxypropylene-polyoxyethylene (block or random) alkyl ethers, POE phenylphenol ethers, POE styrenated phenol ethers,
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