Public domain
Untitled photo, possibly related to: Forest Products Laboratory, Madison, Wisconsin. The Forest Products Laboratory has developed from lignin a black plastic which looks like bakelite. Wood contains about eighty percent cellulose fibre and twenty percent lignin, which has heretofore been considered
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUntitled photo, possibly related to: Forest Products Laboratory, Madison, Wisconsin. The Forest Products Laboratory has developed from lignin a black plastic which looks like bakelite. Wood contains a. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.