Owens-Corning Fiberglas Notes of a Meeting with Johns-Manville on the Filter Press Process for Calcium Silicate (1968)

One page of Owens-Corning Fiberglas notes of a meeting at Johns-Manville's plant in Manville, New Jersey, on February 23, 1968, headed "Filter Press Process - Manufacture of Calcium Silicates." Four J-M men, among them vice president Ward Burleson, met four from Owens-Corning about J-M's process for making Thermobestos, its calcium silicate insulation. The notes record that "Thermobestos contains only chrysotile asbestos. No amosite asbestos is used, because of (1) costs and (2) health problems. Amosite is on the list of 'bad actors' from a health standpoint according to J-M." They also describe J-M's new wet method of opening chrysotile, which let it use less asbestos than Owens-Corning at lower cost.

What it shows

The notes record Johns-Manville telling a competitor in 1968 that it kept amosite out of Thermobestos partly for health reasons. Owens-Corning was then making Kaylo, and the two companies appear to have been discussing whether Owens-Corning would take up J-M's process.

In Johns-Manville's index

Johns-Manville's legal department indexed the Motley 1,000 in 1984. Its index describes this document as follows:

OCF document entitled "Johns-Manville, Manville, New Jersey," dated 2/23/68, subject "Filter Press Process - Manufacture of Calcium Silicates." Appears to be notes of a meeting between J-M and OCF personnel. The notes indicate that Thermobestos contains only chrysotile asbestos. No amosite asbestos is used because of 1) cost and 2) health problems. In recent years J-M has developed new methods for opening chrysotile and J-M describes its process as a wet process. The new method permits J-M to use less asbestos than OCF does at substantially less cost.

About this copy

This is document 574 of the Motley 1,000, from the set the Manville Personal Injury Settlement Trust's records facility certified as true copies, pages CRMC-Motley1000-Subj-001971 to CRMC-Motley1000-Subj-001971.