The Van Dyke process, invented by F. R. Van Dyke in 1901, created an intermediary print—a white line on a dark brown ground—that could be used in any of several other processes, such as blueprinting, to create a positive print, i.e.
The Van Dyke process, invented by F. R. Van Dyke in 1901, created a white outline on a dark surface that could be utilized in multiple procedures, including blueprinting, to generate a positive image, specifically for use in various applications.