The content of protein in tea is 15-30%, most of which is water insoluble but alkalisoluble.
茶叶中含有15%-30%的蛋白质，其中大部分不溶于水，易溶于碱。
2
Soluble in water, acid, alkali and hard water, with good dispersion.
易溶于水，耐酸、碱及硬水，具有较好的分散性。
3
The results show that there is a good relation between the expansion caused by alkali - silica reaction (ASR) and the watersolublealkali content or the effective alkali content.