W. Sahle et al., AIRBORNE TUNGSTEN-OXIDE WHISKERS IN A HARD-METAL INDUSTRY - PRELIMINARY FINDINGS, The Annals of occupational hygiene, 38(1), 1994, pp. 37-44
In spite of an increased risk of death due to pulmonary fibrosis among
workers in the hard-metal industry, only one other publication [SAHLE
, Chest (Lett.) 102, 1310 (1992)] has reported the presence of airborn
e fibres in the working environment. In this study, airborne tungsten
oxide fibres are observed in such an environment. The fibres are forme
d and released to the environment as a by-product during the reduction
stage of the raw material.