The PH value of technical grade sodium hexametaphosphate aqueous solution is close to neutral, so its traditional use in dyeing and finishing is mainly used as a water softener. It can prevent the agglomeration of dyes and soaps, and can also treat boilers, recycle water and use it as a scouring aid.

Technical grade grade sodium hexametaphosphate can also require particularly strict requirements for the elasticity and whiteness of white fabric production. The accumulation of some dyes in the fabric production will affect the surface quality of the fabric and cause the luster of the fabric to be dull. Even gray areas appear on the cloth surface, making some special fabrics fail to meet the quality requirements.

Such a problem can be solved through the hot water boiling process of technical grade sodium hexametaphosphate produced by Chongqing Chuandong Chemical Group. One thing to note is that the temperature is 100°C and the holding time is 30min. The fluorescent whitening temperature is 60℃ and the time is 30min. 95% of the fabrics produced by this process can meet the requirements of foreign businessmen. The rest of the gray and faint fabrics are bleached and dyed by the new technology.

In fact, technical grade sodium hexametaphosphate can form complexes with calcium and magnesium ions in water in traditional uses. It can also extract calcium and magnesium ions from the formed insoluble calcium soap, magnesium soap, calcium dye, and magnesium dye precipitate, and re-dissolve the precipitate. Therefore, the industrial grade sodium hexametaphosphate can effectively remove the gray material on the fabric, and then whiten and emulsify the fabric to meet the special quality requirements.