Longo W E, Rigler M W, Slade J
Materials Analytical Services, Inc., Norcross, Georgia 30092, USA.
Cancer Res. 1995 Jun 1;55(11):2232-5.
The original version of the Kent Micronite cigarette filter used crocidolite, a form of asbestos, from 1952 until at least mid-1956. Cigarettes from intact, unopened packs of the brand from this period were examined. One filter contained approximately 10 mg of crocidolite. Crocidolite structures were found in the mainstream smoke from the first two puffs of each cigarette smoked. At the observed rates of asbestos release, a person smoking a pack of these cigarettes each day would take in more than 131 million crocidolite structures longer than 5 microns in 1 year. These observations suggest that people who smoked the original version of this cigarette should be warned of their possible substantial exposure to crocidolite during the 1950s.
1952年至至少1956年年中，肯特微滤嘴香烟的原始版本使用了青石棉（一种石棉）。对这一时期该品牌完好未开封包装的香烟进行了检查。一个滤嘴约含10毫克青石棉。在每支香烟吸食的前两口主流烟雾中发现了青石棉结构。按照观察到的石棉释放速率，每天吸食一包这种香烟的人在1年内会吸入超过1.31亿个长度超过5微米的青石棉结构。这些观察结果表明，吸食该款香烟原始版本的人应被告知，他们在20世纪50年代可能大量接触到了青石棉。
