Siwell·Rebon® SR-319 is a high molecules alkyl ammonium salt copolymer with affinity pigment groups. High molecular weight has effects of deflocculation for pigments by steric hindrance, anchoring and clamping while provides same electric charge for different pigments to avoid the possible phenomena of co-flocculation that is produced by pigments with different electric charge. SR-319 provides excellent storage stability for products after dispersing and grinding, and it is good at improving transparency, covering area, and pigments content.