Function of A-388Gloss Additives not Optical brightener 1.Mainly for improve brightness / gloss / shinness of all plastics, like polyester, nylon and polyprolylene,polycarbonate, PVC, EVA, PET, PETG, AS, ABS, PS, HIPS ect. 2. Also remove dull color of recycled plastics or plastics which adding too much fillers, thus to make the plastic surface gain brightness and shinness and gloss again. to have a nice surface looking. 3. Also work as the flow agent to improve the plastic melt flow by adding higher dosage 1-2% Advantage of Gloss Additives 1. Brightening agent ----high brightening intensity, good disperson, good fluidity 2. Excellent performance in brightening / gloss / shinning improvement, widely used in polyester, nylon fiber and all kinds of plastics products. 3. Have good resistance to high temperature. 4. could also improve The internal and external lubrication ,dispersion and fluidity 5. super low dosage 0.2% to 0.8% and NO EFFECT ON Plastics transparency