porotype definition

  • noun:
    • A copy of a print, composing, etc., made by placing it upon a chemically prepared report that is applied by a gas which permeates the paper of the print, writing, etc.
    • A print generated by exposing another printing or a writing, placed on the area of chemically prepared paper, to a gas which permeates those areas of finished . becoming copied which are not rendered impervious by the ink, and so acts upon the chemical area in the same way that light acts upon the sensitized film of paper exposed under a photographic unfavorable.
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