Heliotype meaning

hē'lē-ə-tīp'
A photomechanically produced plate for pictures or type made by exposing a gelatin film under a negative, hardening it with chrome alum, and printing directly from it.
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The process of producing a heliotype.
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A picture obtained by the process of heliotypy.
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Origin of heliotype

  • helio- +‎ -type
    From Wiktionary