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Tianjin Mastone Chemical Co., Ltd is a manufactuer of textile dyes and auxiliary, we mainly produce mastone series of sulphur dyes. We have four production plants and a standardization plant, the annual output around 12000mt. Our Perfect QC syatem, professional inspectors, prominent sales team, as well as our jonit efforts, keep us always leading in sulphur dyes market. In faith of "Development owing to being innovative, Good service keeping business for long,Success oringinating from high quality", we would like to hold hands with every friend from all over the world to creat a glorious future together.