Glazing films made with a layer of SPD (suspended particle device) emulsion that changes from opaque to clear when low voltage is applied, are going into high production. These films are applied to glass or polycarbonate windows. Over 35 companies have licensed the Smart Glass technology from Research Frontiers Inc., Woodbury, N.Y., including two major Japanese firms-Hitachi Chemical Co. and Dainippon Ink and Chemical. Both are licensed to produce and sell emulsions and films. Dainippon currently has capacity for about 2000 m2/month. It plans to increase capacity to 36,000 m2/month next year. Dainippon's latest emulsion boasts improved uv curing and less haze. The original licensor, Hankuk Glass in Korea, stopped production of SPD films in late 2004.