The modern process was developed in 1769 by the Swedish chemist Carl Wilhelm Scheele.
Maria Novella, Florence, Italy*Alberti's works online**"De pictura"/"Della pittura", original Latin and Italian texts (English translation)**"Libri della famiglia – Libro 3 – Dignità del volgare" on audio MP3** "Momus", (printed in Rome in 1520), full digital facsimile, CAMENA Project**"The Architecture of Leon Batista Alberti in Ten Books", (printed in London in 1755), full digital facsimile, Linda Hall Library**Read online "Ten Books on Architecture by Leone Battista Alberti"**Works of Alberti, book facsimiles via archive.org