Owens-Illinois, Hydrous Calcium Silicates Part V, Physical and Chemical Properties of Kaylo Products, Excerpt (1952)

The cover page and one text page of an internal report of the Owens-Illinois General Research Division, "Hydrous Calcium Silicates, Part V: Physical and Chemical Properties of Kaylo Products," dated October 13, 1952. The page, headed "Other Properties of Kaylo," says the dust of Kaylo consists of hydrous calcium silicate and asbestos, and that Saranac had found "the hydrous calcium silicate is harmless, and the asbestos manifested the usual effect of this mineral." It concluded: "The actual hazard to health of those handling kaylo was considered to be small."

What it shows

The page is the company's own summary of Saranac's final report, written nine months after it. The report had found that Kaylo dust caused asbestosis in animals; this internal account described the hazard to people handling Kaylo as small.

In Johns-Manville's index

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

Report entitled "Hydrous Calcium Silicates: Part 5, Physical and Chemical Properties of Kaylo Products." Only includes page 20 of the report entitled "Other Properties of Kaylo." Page 20 states that Kaylo dust consists of hydrous calcium silicate and asbestos. The hazards of such dust to health have been investigated by the Trudeau Laboratories at Saranac Lake and it has been found that the hydrous calcium silicate is harmless and that the "asbestos manifested the usual effect of this mineral." The actual hazard to health of those handling Kaylo is considered to be "small."

Related documents

• Saranac Laboratory, Final Report on the Capacity of Inhaled Kaylo Dust to Injure the Lung (1952)

About this copy

This is document 243 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-001398 to CRMC-Motley1000-Subj-001399.