中老年人都想把白发染黑,时髦的年轻人也想变个发色,可如今染发剂这么多,到底如何选才对?第一关:确认完整标示选购染发剂时,一定要看清产品是否有完整外包装,并进一步检查产品标示的完整性,主要包括:主要成分及含量、制造厂或代理商的名称及地址、出厂日期或批号、保存期限、用途以及用法等。第二关:核实敏感成分与浓度 In the elderly want to black hair, stylish young people also want to change a hair color, but now so many hair dyes, in the end how to choose? The first pass: confirm the full selection of optional hair dye, be sure to See whether the product has a complete packaging, and further check the integrity of product labeling, including: the main ingredients and content, the name and address of the manufacturer or agent, date of manufacture or batch number, shelf life, use and usage. Second pass: Verify sensitive ingredients and concentrations