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75.  The Graver or Burin 49 76.  Sandpaper 50 77.  Sulphur Tints 50 78.  Mottled Tints 51 79.  Stopping-out before all Biting 51   B. Zink Plates and Steel Plates. 80.  Zink Plates 52 81.  Steel Plates 52   C. Various other Processes. 82.  Soft Ground Etching 52 83.  Dry Point Etching 53 84.  The Pen Process 54   CHAPTER VIII. PROVING AND PRINTING.   85.  Wax Proofs 55 86.  The Printing-Press 55 87.  Natural Printing 56 88.  Artificial Printing 56 89.  Handwiping with Retroussage 57 90.  Tinting with a Stiff Rag 57 91.  Wiping with the Rag only 58 92.  Limits of Artificial Printing 58 93.  Printing Inks 59 94.  Paper 59 95.  Épreuves Volantes 60 96.  Proofs before Lettering 60 97.  Épreuves de Remarque 60 98.  Number of Impressions which a Plate is capable of yielding 60 99.  Steel-facing 61 100.  Copper-facing Zink Plates 62   Notes By the Translator 63 List of Works on the Practice and History of Etching 75 A.  Technical Treatises 75 B.