Identity elements
Reference code
Name and location of repository
Level of description
Item
Title
D23219-9
Date(s)
- 1946-08-06 (Creation)
Extent
Name of creator
(1919-1980)
Content and structure elements
Scope and content
Independent Insulation Inc. of Fife produced rock wool to be used for insulation in factories and homes. Three kinds of rock - copper slag from the Tacoma smelter, quartz silica, ands basalt - were layered with coke and limestone, as a flux, and heated to 2,600 degrees Fahrenheit. Once molten the rock was combined under pressure with live steam; it shot out of a man-made volcano and into a long blowing chamber. The rock emerges from the furnace in molten globulets and the speed at which it is cooled creates its thread-like texture. (TNT 3/22/1946; 3/30/1947)
Factories--Fife--1940-1950; Independent Insulation, Inc. (Fife);