sodium alginate is used as additive for active dyestuff, which is superior to grain starch and other paste. Using sodium alginate as the printing paste would not affect the reactive dyes and dyeing process, at the same time it can get a brilliant and bright colors and good sharpness, with high color yield and uniformity, and it is easy washing after printing. The most important, after using sodium alginate, the fabrics feel good and look good. It is not only suitable for cotton printing, but also for wool, silk, synthetic printing, particularly applicable to the preparation of dyeing printing paste.