One of the issues with asbestos is that there have been two types used in Australia, white asbestos and blue asbestos. Blue asbestos is far more dangerous than is white, probably because the fibres are more brittle and don't usually break into bits small enough to inhale.
Most Australian manufacture used white asbestos until the 1950s, when increasing production meant shortages of raw materials, and blue asbestos increasingly was added to the mix. There is no practical way of telling which is present in any particular case.
It seems to me that the risk is likely to be overstated in most cases - for example, until the 1980s, nearly all brake linings had large proportions of asbestos in their composition. And what happens to brake linings? They are converted to very fine dust, which ends up widely dispersed, so that it is a reasonable assumption that almost everyone, at least in the urban population, was exposed to asbestos for fifty years or more. Yet asbestos diseases remain rare in the general population.
I only know of two people who have had mesothelioma, and both of them were easily able to identify specific occupational exposure to gross levels of asbestos dust. One was during his National Service in the RN fifty years before he developed the disease, the other was able to attribute it to using an angle grinder on dry fibro sheeting. On the other hand, my brother-in-law worked in Hardies fibro factory in Sydney for over thirty years, and died in his late eighties from a heart attack attributed to his war service (smoking!). Despite his wife washing clothes covered in asbestos fibres for over twenty years, she is still going in her eighties, and while not in the best of health, none of her issues are asbestos related.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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