xii CONTENTS 



SECTION PAGE 



2. GOATSKINS ... 99 



3. SEALSKINS 106 



4. SHEEPSKINS no 



5. CALFSKINS 120 



6. JAPANNED AND ENAMELLED LEATHERS . . . .123 



PART III. 

 CHROME LEATHERS. 



1. THE NATURE OF CHROME LEATHERS 127 



2. GENERAL METHODS OF CHROME LEATHER MANUFACTURE 139 



3. CHROME CALF 156 



4. CHROME GOAT AND SHEEP 163 



5. HEAVY CHROME LEATHERS 170 



PART IV. 

 MISCELLANEOUS TANNAGES. 



1. ALUM TANNAGES 174 



2. FAT TANNAGES 178 



3. OIL TANNAGES 181 



4. FORMALDEHYDE TANNAGE 185 



5. SYNTHETIC TANNING MATERIALS 187 



6. COMBINATION TANNAGES 191 



7. THE EVOLUTION OF THE LEATHER INDUSTRY . . .194 



PART V. 



GELATINE AND GLUE. 



1. PROPERTIES OF GELATINE AND GLUE 200 



2. RAW MATERIALS AND PRELIMINARY TREATMENT 220 



