Physical and Chemical Index
    1, Appearance：light yellow even powder
    2, Fluorescence degree：equivalent standard 100%　
    3, Shade： the same as standard products　
    4, White degree： the same as standard products　
    5, water mins：　<5％　　　　　　　　　　　　　　　　　　　　　
    6, Water insoluble impuritiesContent：<0.5％　　　　　　　　　　　　　　　
    7, Fine degree（Residues after 180um aperture sieve content）：<10％
    8, The maximum ultraviolet wavelength：348nm　　　　　　　　　　　　　　　　
Features
    Fluorescent brightener VBL is double（ triamino） type Fluorescent brightener's representive products，It can be 80 times soft water soluble，ying Ionicity ，PH value is PH＝6～11， dye bath PH 8～9 is better . In acidity solution，yellowing. It is hard water resistant or 300ppm，free chlorine resistant or 0.25％，it is metal ion non-resistance as iron and copper，it is stable in hydros，but it is not hot temperature resistance. It can be used with negative ion surface active agent or dyes, Non-ionic surface active agent, and double oxygen water. Fluorescent colors is blue-violet（bluish violet）. It can not be use with cation type dyes as well as surface active agent， compose resin and so on.
Application
    1, It can be used in cotton and rayon white products whitening， as well as light color or printing products brightening ，the sunlight resistance degree is common，with great fibre like performance， level-dyeing property is common， printing and dyeing , pad dyeing and printing, It can be used for .
    2, It can be used in vinylon, polyamide fibre whitening.
    3, It can be used in papermaking industry, paper pulp or Coating whitening.

Usage method

    In papermaking industry ，with 80 times water to dissolve the fluorescent whitening agents add paper pulp or coating， dosage is dry paper pulp or dry coating , the weight is 0.1—0.3％.
Package, transportation and storage

    Fluorescent brightener VBL paper bucketwith plastic bag inner side or plastic paper bagsPackage，Net weight 25kg　
    In transportation it should prevent of solarization and collide.
    The product should be stored in cool, dry, ventilated warehouse，Storage period is two years.

Instruction（Please read carefully）
     All the application environment of the products should be fully tested to make sure the specific application and the relative arts. The above conditions are for reference. The medicine and amount should be regulated according to the quality requirement. The article was written according to the existing technical knowledge and experience. The customers self-test is reasonable as for many elements can affect the conditions. The data can not be guaranteed to be fully true in law or those special conditions. What is more, you need the relative documents if the application environment should be approved by relative departments.