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collotype

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collotype


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Collotype  \Col"lo*type\,  n.  [Gr.  ?  glue  +  -type.] 
  A  photomechanical  print  made  directly  from  a  hardened  film  of 
  gelatin  or  other  colloid;  also  the  process  of  making  such 
  prints.  According  to  one  method,  the  film  is  sensitized  with 
  potassium  dichromate  and  exposed  to  light  under  a  reversed 
  negative.  After  the  dichromate  has  been  washed  out  the  film 
  is  soaked  in  glycerin  and  water.  As  this  treatment  causes 
  swelling  in  those  parts  of  the  film  which  have  been  acted  on 
  by  light,  a  plate  results  from  which  impressions  can  be  taken 
  with  prepared  ink.  The  albertype,  phototype,  and  heliotype 
  are  collotypes. 
 
  From  WordNet  r  1.6  [wn]: 
 
  collotype 
  n  :  a  kind  of  color  printing,  used  for  the  finest  facsimile 
  reproductions  of  works  of  art  [syn:  {collotype  printing}, 
  {photogelation  process}] 




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