At present,the research foundation of natural dye dyeing is weak and fragmented.So the chemical structure of common natural dyes were introduced in this paper.Select methods for rea-sonable dyeing methods(inluding direct dyeing,reduction dyeing and mordant dyeing)and optimiza-tion according to the structure of dyes.At the same time,the characteristics were compared of pre-mordant dyeing,co-bath mordant dyeing and post-mordant dyeing.It points out that post-mordant dyeing is the most reasonable and commonly used.
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