Category: Science - Chemistry/Biochemistry
Proteins are organic compounds of natural origin, being found in plants and in animals, though much more plentifully in the latter. They are compounds of great complexity of composition, and of very high molecular weight. The constitution of none of them is fully understood, b...
The term "hide" possesses several shades of meaning. In its widest sense it applies to the external covering of all animals, and is sometimes used derogatively for human skin. I...
14. PART V.--GELATINE AND GLUE.Many of the chemical properties of gelatine, especially those which distinguish it from other proteins, have been described in the Introduction to this volume, and need no furth...
12. Part IV., Section I.) is one of the earliest mineral tannages, but isnow of relatively minor importance. Chrome tanning was first investigated by Knapp (1858), who experimented with chromic chloride made "basic" by adding alkali, but his conclusi...
13. PART IV.--MISCELLANEOUS TANNAGESThe use of alum for making pelt into leather is several centuries old. It was the first case of what are called "mineral tannages." The tannage is closely analogous in theory to...
8. PART II.--SKINS FOR LIGHT LEATHERSThe term "skin," like the term "hide," in its widest sense applies to the natural covering for the body of any animal, but is generally used with a narrower meaning in which it...
15. PART VI.--MISCELLANEOUS PROTEINS AND BYE-PRODUCTSIn the leather trades by far the most important and valuable bye-products are obtained from the hides and skins themselves, and all these are obtained before the tannage proper...
6. PART VI.Proteins are organic compounds of natural origin, being found in plants and in animals, though much more plentifully in the latter. They are compounds of great complexity of com...
10. Part I., Section VIII. Calfskins were also used for very light upperwork, in which they were not so heavily greased in finishing, but rather dyed and finished as a light leather. In this direction, however, the vegetable tannage has been almost...
9. Part V., Section I.). The skins may be depickled by paddling in aThe leather manufacturer classifies sheepskins according to the size of the pelts. The large skins are tanned for light upper leathers and similar work. These are called "basils...
11. PART III.--CHROME LEATHERIn these days the manufacture of chrome leather has attained a position hardly less in importance than that occupied by the ancient method of tanning by means of the vegetable t...
5. PART V.1. PART I.4. PART IV.3. PART III.2. PART II.