heliotype
Definition
- Noun:
- A duplicating machine or process that uses a gelatin-coated plate to transfer ink and create a copy. It is an early form of photomechanical printing.
Usage
- The word heliotype is a technical, historical term. It is used to refer specifically to a now-obsolete printing technology from the 19th century.
- It functions as a countable noun (e.g., , ).
Examples
- The library's archive contains several heliotypes of 19th-century architectural drawings.
- This image was reproduced using the heliotype process, which was a precursor to modern offset printing.
- He examined the heliotype carefully, noting the characteristic texture of the gelatin plate's impression.
Advanced Usage
- The term can be used attributively (like an adjective) to describe objects produced by or related to the process.
- The collection features heliotype reproductions of famous paintings.
- They specialized in heliotype printing for scientific publications.
Variants and Related Words
- Collotype: A very similar, often synonymous, photomechanical printing process that also uses a gelatin plate. In modern usage, "collotype" is more common than "heliotype."
- Photogelatin process: Another general name for this family of printing techniques.
Synonyms
- Collotype
- Photogelatin print
Notes on Meaning
- The core meaning of heliotype is tied to its specific historical method of duplication. It is not a general term for any copy or photograph. The reference to "gelatin plate" and "ink" is central to its definition.
Noun
-
duplicator consisting of a gelatin plate from which ink can be taken to make a copy
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