[ Sperical silica particles for use as extenders and fillers for paint, abrasives, rubber, plastics, adhesives, sealants, ceramics, optical diffusing agents, inks, production of slip-improving agents, and decorative materials; ] silica for use in [ the chemical, plastics, metallurgical, glass, paper, ceramic, photography, agricultural, horticultural, forestry, commercial and residential building, construction, automobile, automotive, insulation, packaging, engineering, energy,] electronics, i...