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  Sodium Tri Poly Phosphate (STPP)  

STPP is a white powder; Easily soluble in water; It has got salient chelating capacity to metal ions of Ca and Mg etc. and can soften hard water to make suspension into solution, alkalinity, without causticity . It is a surfactant, and has got outstanding emulsification to lubricants and fat. It has different bulk density. This product has two crystalline forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat when dissolving .

Used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production. In foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry.


Frits are produced in large quantities with raw materials like silica, feldspar, borax, calcium carbonate, etc… which are most of mineral powders. These raw materials are weighed out and blended as dry mixture according to specific batch formulas for each particular frit. The mixture is then melted in a continuous or batch smelter to form a glass. It is then quenched in water to form unground frit. Frits can be supplied in several forms: unground frit, powdered frit, or a sized product.
Frit can be widely used customarily as a component of a glaze, body, or porcelain enamel. 

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