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Optical Brightener OB is a heat-resistant and chemically stable fluorescent brightening agent that increases whiteness and provides brighter colors. It is used to counteract the yellow color of the polymer and produce a whiter appearance. Optical brighteners create brilliance through the fluorescent process of invisible ultraviolet absorption and visible blue emission. Optical Brightener OB Pure Powder 99%min with CAS No 7128-64-5

It also can be called 1,4-Bis(2,4,6-trimethylanilino)anthraquinone ; 1,4-Dimesidinoanthraquinone ; C.I. 61568 ; Estofil Blue S-RBL ; Fat Soluble Brilliant Blue Anthraquinone ; NSC 135500 ; Nitro Fast Blue 2B ; Polysynthren Blue RBL ; Sandoplast Blue 2B ; Solvaperm Blue 2B ; Solvent Blue 104 ; 1,4-Bis(mesitylamino)anthraquinone ; 9,10-Anthracenedione, 1,4-bis((2,4,6-trimethylphenyl)amino)- ; Anthraquinone, 1,4-bis(2,4,6-trimethylanilino)- (8CI) . It is a dark blue powder with slight odor. Solvent Blue 104 Purity 99%min with CAS No 116-75-6Send Inquiry

Optical Brightener ER-I is used in whitening and brightening polyester fiber. It has a good whitening (brightening) agent for polyethylene, polypropylene, PVC and other plastic products，can absorb UV light then emit visible blue light to reduce the yellowish and make the products whiter.Recommended concentration: 0.05-0.5% depends on the application and the desired whiteness. Optical Brightener ER-II Pure Powder 99%min with CAS No 13001-38-2

Ultramarine Blue is a saturated, semitransparent, dark, violet-leaning blue.Ultramarine is a complex sodium silicate containing sulfur and aluminum with the chemical formula Na7Al6Si6O24S3. The intense and distinctive blue color is caused by the unpaired electrons in the sulfur radical anion s3-. Ultramarine has heat and alkali resistant properties. It is chemically stable under normal conditions and resistant to high temperatures.The pigment is also resistant to alkaline solutions and can therefore be used in frescoes. It is usually be used as a colourant and optical brightener for plastics, rubber, inks, color painting, textiles, paper, cosmetics, detergents, cement and architecture.Ultramarine's unique property of flocculation—the tendency of its particles to clump up together—give it a lively granulating texture in washes. Ultramarine Blue Purity 99%min with CAS No 57455-37-5.

Pigment Violet 23 is a transparent purple pigment with high saturation and high tinting strength. C.I. Pigment Violet 23 has better tinting strength in soft PVC, but poor migration resistance. P.V.23 heat resistance above 230℃ in polyolefins. When used in transparent polystyrene, the temperature should be lower than 220°c, above which PV 23 should decompose. When processed in polyester, the temperature is 280℃, stable within 5 hours, and the concentration is above 0.05%. Pigment Violet 23 Purity 99%min with CAS No 6358-30-1

Optical brightener FP-127 is a good plastic fluorescent whitening agent, which can be used for polymer, paint, printing ink and synthetic fiber whitening, brightening. Mainly used in PVC whitening agent, and artificial leather whitening, especially for a variety of plastics and plastic products have a good whitening effect.Optical Brightener FP-127 mainly used inwhitening of plastics such as PVC,PS,ABS,TPR,etc.