Document qJN4Eb66ebbppZVz9Dy2e0xG

FILE NAME: Conwed (CON) DATE: 1964-1974 DOC#: CON003 DOCUMENT DESCRIPTION: Notes from Board Mill Progress Reports U82035 Notes from Board Mill Progress Reports (J. Manisto Files) 03/16/64 Development made a production trial with cationic asbestos 03/25/64 05/64 Trial with cationic asbestos to produce board for 0 - 15 test 03/25 board approved by UL for 0 - 1 5 label service Board made for PR testing 06/02/64 Ucar in tile - trial 07/01/64 Made board for OL No. 12 08/64 Extended operation with Ucar 09/64 C-21 furnish obsoleted-- changed to C-24 1.8% asbestos (Ucar) 01/65 1/2" and 3/4" Lo-Tone ti'le furnish changed to 5% Ucar 03/30/65 C-24 furnish board in production for 2-hour FR 05/01/65* OL FR approval for Heritage 06/70 1/2", 5/8", and 3/4" tile with C-24 furnish 08/70 FS-I furnish to C-24 11/70 Board for Flame Spread test with 13% perlite 12/70 Approval for 0 - 1 5 board for FR test with 51 perlite, C-24 01/73 Tile products with C-28 furnish 03/73 Some 9/16" Lo-Tone lay-in with C-24 plus 4% news because , of. temporary shortage of perlite 03/11/74 Board made for UL FR testing with no asbestos 05/08/74 Beard of 03/11 passed test for FR label service In. FSB Asbestos file (In Cloquet laboratory file) Letter from KAAC on 04/11/58 indicates that we asked the question of health. Letter reply: "I have written for information, references, etc., regarding air hygiene considerations in the handling of asbestos fiber" (signed Algerd F. Jerome).' Statement in a memo of FSB to AMC dated 06/12/61: "Air-borne asbestos fibers are a health hazard, so it should be mandatory personnel working in the dispersing area (referring to dry dispersing) wear some type of dust mask. /t>! 3 . r. . J />/' " that Conwed-Hunt-DeSimone 00373 U82056 Motes from Board Mill Progress Reports (J. Manisto Files) (Continued) Cadotte to FSB - In Lo-Tone the function of asbestos is starch retention; in FR board the asbestos is essential to fire resistance* Memo of 02/23/65 - FSB to BJG Technical information of Union Carbide asbestos. I under stand..that a report was published, probably four or five years ago, by Grunzweig and Hartmann and that a copy was received through our German associate. The subject was on the Health Aspect of Mineral Fiber. That report should be reviewed re the asbestos problem. Cost Standards 1970, Product 55-611 - Ucar 13.85 lb., Amosite 6.90 lb. , which indicates that Amosite was still in the mill in 1970. 1974 standards show only Ucar. l Conwed-Hunt-DeSimone 00374