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heliotypy


heliotypy


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Heliotypy  \He"li*o*ty`py\,  n. 
  A  method  of  transferring  pictures  from  photographic  negatives 
  to  hardened  gelatin  plates  from  which  impressions  are 
  produced  on  paper  as  by  lithography.