In Printing and Textile Industry, It has been a long history since sodium alginate has been used in warp sizing, packing and printing. In printing, it is an ideal kind of material with wide applications in the cotton, wool, silk and synthetic fiber. Especially since active dyestuff came into the world, there has been many years' history of application. Till now, there is no other paste which can compare beauty with it. In food industry,Sodium alginate is widely used in food industry. American call it as "wonderful food additive" and Japanese repute it to be "long-life food additive".