水溶性天然植物染料， 是由焦糖提取的物质。
Water soluble, it is a type of plant derived pigment from caramel .
实践证明天然植物染料在真丝绸上的染色大有可为。
Practice has proved the dyeing on the real silk of natural plant dyestuffs has bright prospects.
由天然植物染料W-CT的萃取实验可得，W-CT热稳定性较好。
The paper showed that the colouring matter from W-CT had good thermal stability.
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