PREFACE.

The many kind letters I have received from America with regard to what must be called my first crude effort at bookmaking, prompted the idea—after issuing a second and revised edition in England—of making an attempt to cater for the inhabitants of Greater Britain, which, under the able editorship of MR. EDWARD L. WILSON will, I have no doubt, meet with approbation and be useful. I have made many important additions to the last English edition.

W. T. WILKINSON.

LEICESTER, ENGLAND.

Besides revising the English edition and incorporating in proper place such additions as I have found useful in practice, I have boiled down the best points from current publications in France and Germany, and added them.

More still, with high regard for the author, I add chapters and parts from, the Handbuch der Chemigraphie und Photochemigraphie, by Mr. J. O. Mörch. Thus, I believe, this work is made complete to date. All the rest must come to the worker, from industrious, careful practice.

Very rapid progress has been made in photo-reproductive processes during the past two years, and improvements are announced almost weekly. I invite all interested to keep me informed of what they discover. If I am supplied with the proper addresses I shall publish and distribute what I learn.

EDWARD L. WILSON.

NEW YORK, May, 1888.

LIST OF ILLUSTRATIONS. . . . 10 The Reversing Mirror ♦ . . . 25 The Dark-room ♦ . . . 37 The Plate-support ♦ . . . 42 The Whirler ♦ . . . 67 The Copying Camera ♦ . . . 88 Example of Zinc Etching (low) ♦ . . . 90 Example of Zinc Etching (high) ♦ . . . 92 Example of Zinc Etching (round) ♦ . . . 93 The Caliber-bridge ♦ . . . 98 The Sieve ♦ . . . 98 The Heating Lamp ♦ . . . 98 The Washing Table ♦ . . . 117 Example of Photo-engraving ♦ . . . 118 Example of Half-tone Engraving ♦ . . . 124 The Dusting-box ♦ . . . 141 The Transfer-board ♦ . . . 167 The Drying-oven ♦ . . . 168 Support for the Drying-oven ♦ . . . 168 Jacket for the Drying-oven ♦ . . . 168 Copper Tank for the Drying-oven ♦ . . . 169 Interior plan for the Drying-oven ♦ . . . 174 A New Drying-oven ♦ . . . 178 The Universal Copying Machine ♦

CONTENTS. PART I. PHOTO-ENGRAVING IN LINE. CHAPTER I. ♦ . . . 9 APPLIANCES FOR MAKING PHOTOGRAPHIC NEGATIVES CHAPTER II. ♦ . . . 11 THE WET COLLODION PROCESS CHAPTER III. ♦ . . . 24 PHOTOGRAPHIC MANIPULATIONS CHAPTER IV. ♦ . . . 39 APPARATUS FOR PRINTING UPON ZINC CHAPTER V. ♦ . . . 45 PRINTING ON ZINC IN ALBUMEN CHAPTER VI. ♦ . . . 48 PRINTING ON ZINC IN BITUMEN CHAPTER VII. ♦ . . . 51 DIRECT TRANSFERS TO ZINC CHAPTER VIII. ♦ . . . 55 ETCHING LINE TRANSFERS PART II. PHOTO-ENGRAVING IN HALF-TONE. CHAPTER I. ♦ . . . 63 RETROSPECTIVE CHAPTER II. ♦ . . . 65 MAKING GRAINED NEGATIVES CHAPTER III. ♦ . . . 69 ETCHING IN HALF-TONE CHAPTER IV. ♦ . . . 72 PRINTING FROM THE BLOCK CHAPTER V. ♦ . . . 73 THE TRANSFER OF THE DRAWING, AND ITS TREATMENT BEFORE ETCHING CHAPTER VI. ♦ . . . 94 HINTS FROM ALL SOURCES PART III. PHOTO-ENGRAVING ON COPPER. CHAPTER I. ♦ . . . 119 SUBJECTS IN LINE CHAPTER II. ♦ . . . 122 HALF-TONE INTAGLIOS CHAPTER III. ♦ . . . 124 HALF-TONE INTAGLIOS—(Continued) CHAPTER IV. ♦ . . . 127 HALF-TONE INTAGLIOS. ELECTROTYPING METHODS PART IV. PHOTO-LITHOGRAPHY IN LINE. CHAPTER I. ♦ . . . 129 PHOTO-LITHOGRAPHY IN LINE CHAPTER II. ♦ . . . 132 PAPER TRANSFERS CHAPTER III. ♦ . . . 136 PAPER TRANSFERS—(Continued) CHAPTER IV. ♦ . . . 139 TOOVEY’S NEGATIVE TRANSFER PROCESS CHAPTER V. ♦ . . . 140 PHOTO-LITHO. TRANSFERS PART V. PHOTO-LITHOGRAPHY IN HALF-TONE. CHAPTER I. ♦ . . . 143 PHOTO-LITHOGRAPHY IN HALF-TONE CHAPTER II. ♦ . . . 144 INK PHOTOS CHAPTER III. ♦ . . . 147 HUSBAND’S PAPYROTINT PROCESS PART VI. COLLOGRAPHIC PRINTING. CHAPTER I. ♦ . . . 151 HALF-TONE PHOTOGRAPHIC NEGATIVES CHAPTER II. ♦ . . . 152 THE HELIOTYPE PROCESS CHAPTER III. ♦ . . . 163 THE COLLOTYPE PROCESS CHAPTER IV. ♦ . . . 171 PRINTING FROM THE COLLOTYPE PLATE CHAPTER V. ♦ . . . 178 THE NEW HOME PRINTING PROCESS