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    Fluorescent Brightener 4BK

    ◆ technical index

    1. Appearance: light yellow uniform powder

    2. Fineness (residue content through 120um sieve): ≤5%

    3. Moisture: ≤5%

    4. Color light: slightly blue

    ◆ Performance and characteristics

    1. It has an efficient fluorescent whitening effect with a slight blue light.

    2. Not sensitive to light and stable chemical performance.

    3. It has good resistance to weak acid, perborate and hydrogen peroxide.

    ◆ Scope of application

    It is suitable for the whitening of cotton and polyester-cotton blended fabrics, and the whitening of cotton blended fabrics.

    ◆ How to use

    1. Dip Absorption method:

    Dosage: 0.1-0.8% (owf), bath ratio: 1:10-30, temperature × time: 90-100°C × 30-40min, washed with water, and dried.

    2. One bath method of scouring, oxygen bleaching and fluorescent whitening

    Dosage: 0.2%-0.8% (owf), hydrogen peroxide: 5-15g/L, stabilizer: 1-5g/L, NaOH: 2-4g/L, scouring agent: 0.5-1g/L, bath ratio: 1: 10-30 temperature × time: 90-100°C × 30-40min, washed with water and dried. The specific process can be adjusted according to different needs.

    ◆ Packaging and storage

    25kg, 50kg cardboard drums lined with plastic bags, stored in a cool, dry place away from light.

    ◆ Cautions

    1. The product information is for reference, research and appraisal only, and the company does not assume the responsibility and patent disputes caused by this.

    2. If you have any technical or usage problems, please contact our company in time.

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