http://shodhganga.inflibnet.ac.in/bitst ... er%202.pdfProtein fibres such as silk and wool are more difficult to ignite. It takes twice
as much heat to ignite wool as cotton and wool extinguishes more quickly in
moving air.44 Because of their nitrogen contents and in the case of wool, its
sulphur content, both silk and wool fibres have low intrinsic flammability with
limiting Oxygen Index (LOI) values of 23% and 25% respectively. Wool is in
the class of fibres, which char and burn but it does so to a lesser degree and
at a slower rate than the other fibres in this class, namely acrylics and
cellulosics.
Interesting. Not being an Engineer I've stuffed the sappers guide with all sorts of stuff. I better start making entries for Archimedes anti-ship death rays and Ulixes self propelled siege horses... All refined with good, solid personal experience of course....