optical brightener in china

Shandong Raytop Chemical Co., Ltd is an optical brightener manufacturers and our products are very poplar in China. 
Shandong Raytop Chem established in 2006, and as an optical brightener manufacturers, and we have many long term co-operations in China. 

Model NO. Optical brightener OB-1
Specification 98% Min
Origin China
HS Code 32042000
Product Description Optical Brightener OB-1
Application/Uses

Coatings，Plastics，Man-made fibers，Polyester，Polymers，Recycled polymers，Key Attributes

Colors appear more brilliant
Environmentally friendly
Excellent brightening ability
Produce a bluish tinge, masking yellowness
Whiter-than-white appearance
Product Description

Raytop optical brighteners significantly improve the whiteness in both textile fibers and plastics. In polyester and nylon fibers, Raytop optical brighteners impart a pleasing whiter-than-white appearance and give more intensity to some colors as well. Because of its excellent brightening ability, good thermal stability, and compatibility with many polymers, Raytop OB-1 is an effective brightener for many plastics. Raytop OB-1 provides an excellent white, permanent color since the brightener is dissolved in the polymer or fiber during polymer manufacture. This permanence gives much better brightness retention over time versus other methods such as bleaching or surface treatment with optical brighteners. Optical whiteners function by absorbing ultraviolet radiation and re-emitting blue light. The emitted blue light will reduce the yellow color of a polymer and provide the whiter-than-white appearance.

Typical Properties

Property Typical Value
Appearance Yellow greenish powder
Specific Gravity @ 20ºC/20ºC 1.39
Melting Point 359-361ºC
Assay 98 wt % min
Particle Size Pass 200 mes

RAYTOP specializes in manufacturing optical brightener series products and additives, and one of our main market is in China.
In the past years, we as one of leading optical brightener manufactures, has also introduced advanced testing equipment, high performance liquid chromatography, whiteness meter, automatic melting point meter, to maintain high and stable quality for clients in China.
Raytop is a leading optical brightener manufacturer, and we provide free samples for our potential customers in China.