COLLOTYPE
AND
Photo-Lithography

PRACTICALLY ELABORATED BY
DR. JULIUS SCHNAUSS,
Member of the Imperial German Academy of Naturalists, &c.

TRANSLATED, WITH THE AUTHOR’S SANCTION AND ASSISTANCE,
BY
EDWIN C. MIDDLETON.

TOGETHER WITH AN APPENDIX ON
STEAM PRESSES,
BY THE TRANSLATOR.

LONDON:
ILIFFE AND SON, 3, ST. BRIDE STREET, LUDGATE CIRCUS,
1889.

PRINTED BY ILIFFE AND SON, 3, ST. BRIDE STREET, LUDGATE CIRCUS, LONDON, E.C. WORKS: COVENTRY.

CONTENTS.

CHAPTER.	PAGE.
I.	Introductory	[9]
II.	Bichromates in Conjunction with OrganicSubstances	[12]
III.	Summary of the more important PrintingProcesses with Chromated Gelatine	[18]
IV.	Collotype Apparatus	[25]
V.	Chemicals and Materials for Collotype	[46]
VI.	Preparation of the Collotype Plate	[59]
VII.	Negatives suitable for Collotype	[72]
VIII.	Printing in the Press	[88]
IX.	Finishing and Varnishing Collotype Prints	[96]
X.	Other Collotype Processes	[102]
XI.	Failures in Collotype: In the Preparation ofthe Plates	[107]
XII.	Investigations on Collotype	[114]
XIII.	Collotype in Natural Colours	[119]
XIV.	Magic Prints	[122]
XV.	Photo “Glass” Printing	[124]
XVI.	Allgeyer’s Collotype Process	[127]
XVII.	Practice of Photo-Lithography	[130]
XVIII.	Autography	[135]
XIX.	Negatives for Photo-Lithography	[149]
XX.	Application of the Carbon Process to Photo-Lithography	[155]
Appendix.
	Steam Presses	[162]