东西烘干后变色怎么回事? 以下是引用 gentleseven 在2008-6-24 15:46:00的发言: tea is an acid, if you heat it, this would probably make a good condition to do some reactions with your product. or maybe the contration give you an impression which those dark residues look less colourful when they were diluted. tea is an acid?3楼的懂有机吗?查看更多