On 22/12/14 18:44, Mathew Newton wrote:
On Monday, 22 December 2014 18:32:44 UTC, harry wrote:

Mineral wool, not glass wool.
Quite different stuff.

No; glass wool is a type of mineral wool.

that's why its called rockwool then is it?

http://en.wikipedia.org/wiki/Mineral_wool#Manufacture


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