Public domain
The Photographic Copying Processes with Silver Salts (Positive Process) and the Photographic Raw and Baryta Papers
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
Subjects
Credit lineDie photographischen Kopierverfahren mit Silbersalzen (Positiv-Prozess) und die photographischen Roh- u. Barytpapiere. 1928. Josef Maria Eder. Rijksmuseum, Amsterdam. Public domain.