Identity elements
Reference code
Name and location of repository
Level of description
Item
Title
D23219-2
Date(s)
- 1946-08-06 (Creation)
Extent
Name of creator
(1919-1980)
Content and structure elements
Scope and content
Independent Insulation, Inc., exterior of plant. Independent Insulation produced rock wool as insulation for factories and homes. Rock was poured in at one end of the production line and it came out as rock wool at the other end. Three kinds of rock; copper slag from the Tacoma smelter, quartz silica and basalt, with limestone added as a flux, were layered with coke, and heated to 2,600 degrees farenheit. The molten stream which flowed off was broken up by live steam under pressure. (TNT 3/22/1946; 3/30/1947)
Factories--Fife--1940-1950; Independent Insulation, Inc. (Fife);