Mineral wool
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Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. It was first manufactured in the 19th century. Applications include therm
Mineral wool close-up
Mineral wool pipe covering applied to a steel pipe for a fire test
Common insulation applications in an apartment building
An article from the Niagara Districts Post-War Series published by The Standard in October 1946. The article is focused on Spun Rock Wools Limited in Thorold, Ontario. The plant used stone wool to manufacture thermal insulation.
Pele's hair
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Pele's hair is the name given to clumps of basalt fibers formed from volcanic glass when lava is stretched into thin strands during cooling, usually from lava fountains, lava cascades, or fierce lava
Mineral wool
…stream of air across a falling flow of liquid iron slag which was similar to the natural occurrence of fine strands of volcanic slag from Kilauea called Pele's hair created by strong winds blowing apart the slag during an eruption. In 1936 Spun Rock Wools Limited of Thorold Ontario Canada registered a trademark for…
Pele's hair, with a hand lens as scale
Strands of Pele's hair viewed under microscope
First description by J. Dana, 1849
Pele's hair caught on a radio antenna mounted on the south rim of Puʻu ʻŌʻō, Hawaiʻi, July 22, 2005