Modern heliographic processes

Contents

Chemical and physical action of light -- Classification of heliographic processes -- Paper -- Various methods of sensitizing -- Dishes or trays -- devices and machines for sensitizing -- Printing frames -- How to use the printing frame -- Exposure to the action of light -- Silver prints -- Processes with salts of iron -- Processes with salts of chromium -- Processes with salts of uranium -- Two methods for producing the original tracing as a negative -- Table of chemicals mentioned in this book.