Public domain
Synthetic rubber (Ameripol). After the milling process, where crumbs of synthetic rubber are pressed into sheets, then trimmed to size and cooled, the sheets are placed in the charging and discharging vacuum dryers. As each is removed, another replaces it. Goodrich
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineSynthetic rubber (Ameripol). After the milling process, where crumbs of synthetic rubber are pressed into sheets, then trimmed to size and cooled, the sheets are placed in the charging and discharging. 1942-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.