Documents in our library describe Ebonized Asbestos (Keasbey & Mattison) as “an impregnated asbestos-cement sheet of unusual dielectric strength ... this fine insulating board”.1 They give it as made from 1924.1 Where the documents differ, each is listed below with its source.
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What each document says
Every statement about Ebonized Asbestos (Keasbey & Mattison) in the documents, in each document's own words.
Asbestos Magazine, 1954, February 1954
Asbestos Magazine, 1931, September 1931
- Use: “Ebonized Asbestos for electrical uses”, p. 132
Asbestos Magazine, 1942, August 1942
- Use: “As an insulating material for the mounting of electrical apparatus ... In switchboards, panels and testing tables”, p. 353
Keasbey & Mattison: Asbestos in Action. A toothache sits for its portrait (1947)
- Use: “control boards mounted on K&M Ebonized Asbestos [in X-ray machines] ... switchboards, bus bar runs, compartment linings”, p. 14
Asbestos Magazine, 1961, September 1961
- Made at: “Plant No. 1, KEASBEY & MATTISON COMPANY's building products manufacturing plant, Ambler, Pennsylvania ... Departments 107 and 111 ebonized asbestos products” (at Ambler, Pennsylvania (Plant No. 1)), said by Keasbey & Mattison Company, as recorded by Asbestos (magazine), p. 505
Sourcebook on Asbestos Diseases: Medical, Legal, and Engineering Aspects, Volume Two
- Description: “cement, electrical insulation” (as of 1897), p. 746
Kind of product
We list Ebonized Asbestos (Keasbey & Mattison) with asbestos-cement pipe, board and sheet, from how the documents describe it. That page explains how such products exposed workers.
Trades that worked with products like it: Carpenters and Construction Workers, Electricians and Electrical Workers.
Other asbestos-cement pipe, board and sheet by Keasbey & Mattison (33)
Century · 'Century' Apac · Fluid-Tite · Apac · Air-Duct · Uni-syn Packing · Aircell · Amberlite Packing · Apac Board · Asbestoroc · Chrom-Tex · Dualay · Industal · Industrial · K & M 103 · K & M 601 · K & M 801 · K & M Aircell · K&M Best in Asbestos · K&M Trafford Tile Asbestos Cement · and 13 more on the company's page
Asbestos-cement pipe, board and sheet by other makers (350)
Flexboard (Johns-Manville) · Thermobestos · Careytemp (Philip Carey) · Min-k (Johns-Manville) · Unibestos (Union Asbestos & Rubber Co.) · Dura-Color (GAF) · Duracolor (GAF) · Duraform (Turner Brothers Asbestos) · Duralite (Asbestos Corp. of America) · Duroc (GAF) · Dutch Lap (GAF) · Ebonized Asbestos (Ambler Asbestos) · Economy 250 (National Gypsum) · Equality (Johns-Manville) · Eternit (GAF) · Eternit (Ruberoid) · Eternit Asbestos Shingles (American Insulation Co.) · Eternit Stonewall (GAF) · Eternit Stonewall Siding (Eternit, Inc.) · Facad (United States Plywood) · and 330 more: all asbestos-cement pipe, board and sheet
See also
- Keasbey & Mattison: the company's history, documents, people, products and plants
- Keasbey & Mattison on our products page: what the documents say about the company's asbestos products, with sources
References
- Asbestos Magazine, 1954, February 1954 (February 1, 1954), p. 8.
- Asbestos Magazine, 1931, September 1931 (September 1, 1931), p. 13.
- Asbestos Magazine, 1942, August 1942 (August 1, 1942), p. 35.
- Keasbey & Mattison: Asbestos in Action. A toothache sits for its portrait (October 25, 1947), p. 1.
- Asbestos Magazine, 1961, September 1961 (September 1, 1961), p. 50.
- Sourcebook on Asbestos Diseases: Medical, Legal, and Engineering Aspects, Volume Two (1986), p. 74. Not yet published in our library.
Cite this page
“Ebonized Asbestos (Keasbey & Mattison).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/keasbey-and-mattison-ebonized-asbestos.
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