In message
Peter Parry wrote:

On Mon, 14 Dec 2009 17:15:50 +0000, Old Git
wrote:

This type is preferably fitted upside down but will work just as well
horizontally. The pressure in the beast will eject all of the foam.
When the foam is exuded it will spread itself out across the
compartment, smothering everything. The pressure and design of the
nozzle will spray most of it across the compartment but also, when the
foam lands, it will continue to spread itself out and smother the
fire. Not sure what the foaming agent is now but at one time it was Ox
Blood.

Ox blood derived foam was the evil smelling yellow Protein Foam.

I've just found another use for ox blood ;-) the other was:
During the construction of the Pontcysyllte Aqueduct the mortar
used comprised of lime, water and ox blood.

Strange the things you can learn on UKDIY.

Stephen.



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