A Text-book of Tanning: A treatise on the conversion of skins into leather, both practical and theoretical.Procter, H. R. (Henry Richardson)
Science
A Text-book of Tanning: A treatise on the conversion of skins into leather, both practical and theoretical.
Procter, H. R. (Henry Richardson)
Tanning
┬───────────┬───────────┬───────────┬────────────┬────────────┬───────────┐
│Hungarian │ Hemlock │Mimosa │Cutch │ Gambier │Gallotannic│
│Larch │ (Extract).│ bark. │ (Pegu). │ (Cuba). │ Acid, 1 │
│(Extract). │ │ │ │ │ per cent. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼──────────-│
│Yellow │Abundant │Heavy red │Light red │ Reddish │ Usually │
│Flocculent │ red │ deposit │ deposit │ deposit │ some pale │
│deposit │ flocculent│ on │ on cooling.│ on cooling.│ deposit. │
│separates │ deposit. │ cooling. │ │ │ │
│quickly. │ │ │ │ │ │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Yellow pp. │Yellow pp. │Yellow pp. │ Yellow pp. │ Yellow pp. │ No pp. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Dull brown │Dirty green│Full brown │Green-black │Intense │ Blue │
│ pp. │ pp. │ pp. │ pp. │ green │ -black │
│ │ │ │ │ colour. │ pp. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Dull red │Reddened │Purple │ Dark red │ Reddened │ Reddened │
│ pp. │ pp. │ colour. │ pp. │ pp. │ pp. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│No pp. │No pp. │White pp. │ No pp. │ No pp. │ No pp. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Pale pp. │Slight pale│Dense white│ Pale pp. │ Faint │ White pp. │
│ │ pp. │ pp. │ │ clouding. │ │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Slight │Pale pp. │Slight pp. │ Dense pp. │ No pp. │ No pp. │
│ cloud. │ │ │ │ │ │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Deep blue │Dark green │Deep red │Deep violet │Dark green │ Brown pp. │
│coloration.│coloration.│ pp. │ coloration.│ coloration.│ │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Dirty │ Brown pp. │ Slight │Slight cloud│ No pp. │ Pale pp. │
│brown pp. │ │reddish pp.│ soluble in │ │turns blue.│
│ │ │ │ excess. │ │ │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│Slight │ Slight pp.│ Brown pp. │ Ditto. │ Ditto. │ Yellow │
│ clouding. │ │ │ │ │ colour. │
┼───────────┼───────────┼───────────┼────────────┼────────────┼───────────┤
│No change.
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