| http://www.w3.org/ns/prov#value | - A further non-limiting embodiment is use of the BWS materials of the present invention and other photochromic materials with optical organic resin monomers used to produce optically clear coatings, films and polymerizates, e.g., materials suitable for optical applications, such as for example plano and ophthalmic lenses, windows, and automotive transparencies.
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