Chapter XV Iron and Chrome Tannages
Iron tannages — Chrome tannages — Chemistry of chromium compounds — Knapp’s method of chrome tannage — Cavallin — Swan — Heinzerling — Hummel’s improvement — Schultz’s method — Theory of the two-bath process — Practical management of the two-bath process — Dennis’s chrome tanning liquor — Procter’s liquors — Theory of basic process — Practical use of basic liquors — Washing and neutralisation — Effect of sulphur on chrome leather — Bluebacking — Fat-liquoring — Dyeing of chrome leather — Glazing and finishing PAGE 198