indotint

noun2

1. •
   An early photographic process used in the 19th century for reproducing images, particularly maps and plans.

   • E. & H.T. ANTHONY & Co. issue a large photo-engraving printed in what is called “Indotint” of the “Garfield Family,” comprising parents, children, and grandmother. — 1882
2. •
   An image produced by this process.