Extract of the heartwood of acacia catechu used for dying and tanning and preserving fishnets and sails; formerly used medicinally.
用儿茶树的心材提取，用于印染、制革、渔网和帆蓬保养，以前用于医药。
2
This paper have studied vegetable tanning technology of cowhide light leather with modification volanea extract for chief tanning agent and with yellow cow taw for raw skin.