Heliotypy

noun

1. A photographic process in which from an ordinary negative is made a positive of such character that from it a direct impression in ink can be obtained by means of a printing-press.
2. A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.
3. A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.