Document baJrZKVaqo4ELBkNaBV26nn91

Page 925 1 MR. IGNATOWSKI: This is Owens-Corning 2 document Number 813, the Owens-Corning Bates stamp in 3 the bottom. Jon L. Konzen, M.D., September 20th, 4 1972. 5 Asbestos-free Kaylo. 6 Owens-Corning Fiberglas Corporation has for 7 many years marketed under the trademark Kaylo a 8 calcium silicate asbestos-containing high temperature 9 insulation product. 10 During the manufacturing and installation of 11 Kaylo products, airborne concentrations of asbestos12 containing dusts are generated. 13 Overexposure to airborne asbestos dust for a 14 long period of time is known to cause a fibrosis of 15 the lungs called asbestosis. 16 Often this overexposure may not be 17 subjectively offensive to the worker. It usually 18 takes from 10 to 20 years for the first objective 19 clinical sign of asbestosis to appear. 20 Irreversible and progressive lung scarring 21 will, therefore, occur in overexposed workers before