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heliotypy

heliotypy is defined in Webster's Unabridged Dictionary (1913) with 1 sense. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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