Quebracho Wood.
| Temperature of Extraction. | Tanning Matters. | Soluble Non- Tannins. | Per cent. of Tannin on Maximum. | Colour of 1⁄2 per cent. Solutionin 1⁄2 inch Cell. | Per cent. of Colour on Maximum. | |
|---|---|---|---|---|---|---|
| Red. | Yellow. | |||||
| °C. | per cent. | per cent. | deg. | deg. | ||
| 15 | 7·6 | 2·2 | 35·0 | 8·9 | 14·1 | 71·3 |
| 15-30 | 10·1 | 2·4 | 46·5 | 6·4 | 10·7 | 68·7 |
| 30-40 | 11·8 | 2·4 | 54·4 | 5·9 | 9·6 | 65·2 |
| 40-50 | 15·1 | 2·4 | 69·5 | 5·3 | 8·4 | 60·0 |
| 50-60 | 16·5 | 2·4 | 76·0 | 5·4 | 8·5 | 60·4 |
| 60-70 | 17·4 | 2·4 | 80·0 | 5·6 | 8·2 | 59·9 |
| 70-80 | 19·1 | 2·7 | 88·0 | 6·4 | 8·6 | 67·4 |
| 80-90 | 21·7 | 3·0 | 100·0 | 6·4 | 9·4 | 74·3 |
| 90-100 | 19·5 | 3·0 | 89·8 | 6·6 | 9·8 | 100·0 |
Mangrove Bark (Ceriops).
| Temperature of Extraction. | Tanning Matters. | Soluble Non- Tannins. | Per cent. of Tannin on Maximum. | Colour of 1⁄2 per cent. Solutionin 1⁄2 inch Cell. | Per cent. of Colour on Maximum. | |
|---|---|---|---|---|---|---|
| Red. | Yellow. | |||||
| °C. | per cent. | per cent. | deg. | deg. | ||
| 15 | 13·0 | 10·4 | 61·6 | 14·2 | 20·8 | 64·7 |
| 15-30 | 16·1 | 10·4 | 76·3 | 16·1 | 21·7 | 69·8 |
| 30-40 | 17·4 | 12·5 | 82·4 | 15·8 | 23·0 | 71·7 |
| 40-50 | 18·5 | 11·4 | 87·7 | 16·5 | 33·5 | 73·8 |
| 50-60 | 20·3 | 10·3 | 96·2 | 16·0 | 23·4 | 72·8 |
| 60-70 | 20·0 | 11·4 | 94·7 | 17·5 | 31·2 | 90·0 |
| 70-80 | 20·4 | 11·2 | 96·7 | 16·5 | 28·3 | 82·8 |
| 80-90 | 21·1 | 10·8 | 100·0 | 15·4 | 24·6 | 73·8 |
| 90-100 | 20·2 | 11·4 | 95·7 | 23·0 | 34·1 | 100·0 |
Canaigre Root (three years old).
Effect of Different Temperatures.
| Temperature of Extraction. | Tanning Matters absorbed by Hide. | Soluble Non- Tanning Matters. | Per cent. of Tannin on Maximum Yield. | Colour of 1⁄2 per cent. Solutionin 1⁄2 inch Cell. | Per cent. of Colour on Maximum Yield. | ||
|---|---|---|---|---|---|---|---|
| Red. | Yellow. | Total. | |||||
| °C. | per cent | per cent. | deg. | deg. | deg. | ||
| 15 | 21·1 | 13·0 | 78·7 | 1·6 | 4·1 | 5·9 | 41·5 |
| 15-30 | 26·2 | 12·5 | 85·6 | 1·6 | 3·8 | 4·4 | 38·0 |
| 30-40 | 28·1 | 12·5 | 91·8 | 1·4 | 3·7 | 5·1 | 35·9 |
| 40-50 | 30·5 | 13·1 | 99·6 | 2·1 | 4·2 | 6·3 | 44·3 |
| 50-60 | 30·6 | 13·6 | 100·0 | 2·4 | 4·8 | 7·2 | 50·7 |
| 60-70 | 27·2 | 14·1 | 88·8 | 2·5 | 5·0 | 7·5 | 52·7 |
| 70-80 | 26·4 | 14·6 | 86·2 | 2·8 | 6·1 | 8·9 | 62·6 |
| 80-90 | 23·2 | 14·8 | 75·8 | 3·1 | 6·9 | 10·0 | 70·4 |
| 90-100 | 22·8 | 14·8 | 74·5 | 4·3 | 7·4 | 11·7 | 82·4 |
| Boiled 1⁄2 hour | 19·2 | 12·3 | 62·7 | 5·6 | 8·6 | 14·2 | 100·0 |
Cube Gambier.
Effect of Different Temperatures.
| Temperature of Extraction. | Tanning Matters absorbed by Hide. | Soluble Non- Tanning Matters. | Per cent. of Tannin on Maximum Yield. | Colour of 1⁄2 per cent. Solutionin 1⁄2 inch Cell. | Per cent. of Colour on Maximum Yield. | ||
|---|---|---|---|---|---|---|---|
| Red. | Yellow. | Total. | |||||
| °C. | per cent. | per cent. | deg. | deg. | |||
| 15 | 46·8 | 21·8 | 78·0 | 2·5 | 7·8 | 10·3 | 57·2 |
| 15-30 | 48·8 | 21·0 | 81·3 | 1·7 | 8·0 | 9·7 | 54·9 |
| 30-40 | 50·2 | 22·0 | 83·7 | 1·7 | 8·6 | 10·3 | 57·2 |
| 40-50 | 51·9 | 23·0 | 86·5 | 1·7 | 8·8 | 10·5 | 58·3 |
| 50-60 | 51·1 | 20·3 | 91·9 | 1·7 | 8·9 | 10·6 | 58·8 |
| 60-70 | 55·6 | 20·3 | 92·7 | 1·9 | 9·4 | 11·3 | 62·7 |
| 70-80 | 55·7 | 20·3 | 92·8 | 2·2 | 10·1 | 12·3 | 68·3 |
| 80-90 | 55·8 | 21·2 | 93·1 | 2·3 | 10·6 | 12·9 | 71·6 |
| 90-100 | 56·1 | 22·0 | 93·3 | 2·8 | 11·6 | 14·4 | 80·0 |
| Boiled 1⁄2 hour | 60·0 | 20·0 | 100·0 | 3·2 | 14·8 | 18·0 | 100·0 |