| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,318,766 (Smith) discloses photocopolymerizable compositions which may contain conventional non-basic fillers (e.g., silica, talc, glass, glass bubbles, clays, powdered metal such as aluminum, zinc oxide, etc.) up to about 50% by volume or more.However, this patent does not mention the effect clay fillers might have on curing of radiation-curable binders.
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