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USG Interiors produces a family of cast acoustical ceiling panels at its Walworth, WI, facility having various light reflectance, noise reduction, and attenuation specifications with various levels of post-consumer/industrial recycled content. The production line at the Walworth facility employs cast technology in the production of acoustical ceiling panels. Cast acoustical ceiling panels contain mostly mineral wool, starch and stucco. The finishing and packaging unit processes are dominated by the use of water-based paint, which contains the following ingredients: calcium carbonate, clay, latex, titanium dioxide (TiO2), other chemicals. Shrink-wrap and corrugated strip are used as packing materials