1. Plural of heliotype; photographic prints made by a process using light-sensitive materials, especially an early photomechanical printing process.
Usage: technical; historical; printing and photography
2. Images or pictures produced by heliographic or photographic processes.
Usage: archaic; technical

Examples

• The museum's collection includes rare heliotypes from the 19th century.
• Early heliotypes demonstrated the potential of light-based printing techniques.
• Photographers experimented with heliotypes as an alternative to traditional engraving.
• The heliotypes in this archive show the evolution of photomechanical reproduction.
• Collectors value original heliotypes for their historical significance in printing history.