Aromatic Alcohols
Aromatic Acids
3. Condensation of Naphthalene Derivatives
4. Condensation of the Anthracene Group
5. Di- and Triphenylmethane Groups
6. Summary

Table


SECTION III

Tanning Effects of Mixtures and Natural Products

1. Mixture of Phenolsulphonic Acid and Formaldehyde
2. Mixture of Phenolsulphonic Acid and Natural Tannins
3. Tanning Effects of Different Natural Substances


SECTION IV

Methods of Examining Tanning Matters



PART II

Synthetic Tannins: Their Industrial Production and Application

A. Condensation of Free Phenolsulphonic Acid