Document pmYnV1EnVvnnK3kN2boJVxQLa

-6 - 5) Textiles -Asbestos content varies frcm 75 to It is usually blended with v cotton, nylon, orlon, viscose fibers and fibrous glass, theater curtains ironing board covers pot holders 6) Electrical equipment insulating conductors 7) Filter media gas masks chemical processing (acid washes) 8) Filler material plastics paints sealants (roofs, roads) putties, caulking, crack fillers Asbestos vas first discovered and mentioned around 430 B.C. It was rediscovered around 1720 A.D. in Russia. Onewercial production of this mineral did not start, however, until the 1870's. dis occurred both in nmnAm. and the O.8.S.R. with about 300 tons being mined in the first year. With other discoveries, annual production was up to 30,000 tons in 1910 and 500,000 tons in 1930. By 1968 annual, production had exceeded 4,000,000 tons. The united States uses approximately 4C$ of the total asbestos mined. DUP 0901976