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Pretreatment Agents
Product Details

DHK133B is complex of organic acid, it has strong sequestering property under strong alkaline condition, can improve water quality. Especially suitable for strong alkaline condition. 

Key Features and Typical Benefits

◆ Strong alkali resistance, keep stable under 400g/L NaOH alkaline condition

◆ Excellent complexing power and good dispersing property to heavy metal ion under strong alkaline condition. Can effectively disperse inorganic and organic partial, prevent back staining to machines.

◆ Strong dirt removing property.

◆ Can prevent back-staining of polyester in open fiber process in polyester alkali reduction process.

◆ Can effectively improve water quality.

◆ Excellent performance on anti-acid, anti-alkali, anti-oxidation and anti-reduction.

◆ No foam.




Physical form



Syellowish to yellow transparent liquid

Solid content (%)


pH value(1% aqueous solution)


Chelating property to the calcium, mg/g


Flash Point(°C)


Density ( 25°C),g/cm3


Ionic Character



DHK133B can be easily soluble in water, diluted before using. Suitable for various dyeing and printing processes to improve water quality.

1.  Cold pad batch for cotton

Dosage:                  2.0-5.0g/L

DHK133B:            2.0-5.0g/L

NaOH:                   40-70g/L

H2O2(100%):          10-15 g/L

H2O2 Stabilizer:        3-6 g/L

Padding at 30-40℃, rolling, piled up for 16-24 hours, steam, wash.

2.  Continuous scouring and steaming process for cotton

Dosage:                   2.0-5.0g/L

DHK133B:            1.5-3.0 g/L

NaOH:                     40-70g/L

Working liquid 50-60℃, continuous scouring process, liquid pick-up 100%, pile up, wash

Steaming temperature:      98-102℃

Time:                     40-60min

3. Continuous bleaching and steaming process for cotton

Dosage:                    2.0-5.0g/L

DHK133B:                0.5-1.0 g/L

H2O2(100%):                3-5 g/L

H2O2 Stabilizer:         1.5-3 g/L

pH:                              10.5

Working liquid room temperature, continuous scouring process, liquid pick-up 70-80%, pile up, wash.

Steaming temperature:     98-102℃

Time:                        30-45min

4. Alkali deweighting process for polyester

Dosage:                 1.0-3.0g/L

NaOH:                  10-50g/L

Ratio:                   1:10

Temperature:             98℃

Time:                   10-60min

Operating and safety instructions

1. Suggest weighing and diluting separately when preparing the solution.

2. Strongly recommend using soft water in dilution, if soft water is not available, the stability needs to be tested before making the solution.

3. After dilution, it should not be stored for a long time. Pls use up ASAP.

4. To ensure the safety, you should review our Material Safety Data Sheets before using this product under special conditions. MSDS is available from Qingdao Hengke.

Package & Storage:

Plastic drum net 50kg, it can be stored for 12 months under room temperature and hermetic condition without exposure to sunlight..

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Qingdao Hengke Fine Chemicals Co.,Ltd