The dyeing effect of the vegetable dye depends on the dyeing strength.

衡量植物染料的染色效果主要是看其染色牢度。

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If staining, we must use an organic dye, that is, natural vegetable dyes, and dyeing process, chemical synthesis may not add any additives.

如果染色，必须用有机染料，也就是纯天然的植物染料，并且在染色过程中，不得添加任何化学合成助剂。

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