What is another word for heliotype?
Pronunciation: [hˈɛlɪˌɒta͡ɪp] (IPA) 
Heliotype, an outdated printing process that uses a gelatin tissue to transfer the photograph onto a metal plate, has several synonyms that can be used interchangeably. These include collotype, photolithography, and photogravure. Collotype, a similar process to heliotype, uses a gelatin-coated plate that is exposed to light and transferred onto an inked plate. Photolithography, on the other hand, involves using a chemically-treated surface to transfer an image onto a printing plate. Finally, photogravure uses a copper plate etched with tiny grooves that hold ink to create detailed prints. These alternative printing methods offer unique advantages and are still utilized today by artists and photographers around the world.
