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Cutch (Catechu): Heartwood Chips Boiled, Evaporated and Sun-Dried
Cutch, or catechu, is a brown extract of the heartwood of the catechu acacia of India, rich in tannin: a dye and a strong tanning agent. Boil chips of the inner trunk in water, boil the liquor down to a syrup, and harden it in the sun into flat cakes.
The picture: powdered catechu (Maša Sinreih, Valentina Vivod, CC BY-SA 3.0).
初学者
Two days
说明
1
1
Chip the heartwood
Chip the heartwood
Split the dark inner wood of the trunk into small chips with the hatchet.
此步骤所需材料：
儿茶心材5 公斤所需工具：
手斧
等臂天平2
2
Boil
Boil
Boil the chips in water for some hours, strain off the brown liquor, and boil the chips again in fresh water. Combine the liquors.
所需工具：
大汤锅
火塘
薪柴
滤网
水3
3
Boil down
Boil down
Boil the liquor down over the fire, stirring as it thickens, until it is a syrup.
所需工具：
大汤锅火塘薪柴
木勺4
4
Sun-dry
Sun-dry
Pour the syrup thin onto a tray and leave it in the sun until it sets hard. Break it into flat cakes.
所需工具：
平底干燥盘等臂天平5
5
Cutch and bark
Cutch and bark
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