1. a photographic print made by a process using the action of light on a specially prepared surface, typically involving gelatin and bitumen.
Usage: technical; historical; printing and photography
2. a printing process or technique that produces images through the exposure of light-sensitive materials.
Usage: technical; archaic

Examples

• The museum displayed a heliotype from the 19th century showing early photographic innovation.
• Heliotypes were among the first successful methods for reproducing photographs in print.
• The artist experimented with heliotype techniques to create fine art prints.
• Before modern offset printing, heliotype was used to produce high-quality reproductions.
• The heliotype process required careful control of light exposure and chemical treatment.