Photozincography

Photozincography, sometimes referred to as heliozincography but essentially the same process, known commercially as zinco, is the photographic process developed by Sir Henry James FRS (1803–1877) in the mid-nineteenth century.

"Zinco" redirects here. For the character in the Hellboy comic book series, see Karl Ruprect Kroenen. For the same character in an animated comic, see Hellboy II: The Golden Army § Zinco epilogue.

This method enabled the accurate reproduction of images, manuscript text and outline engravings, which proved invaluable when originally used to create maps during the Ordnance Survey of Great Britain during the 1850s, carried out by the government's Topographical Department, headed by Colonel Sir Henry James.

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