The FAQ about Substitute Alkali (Production Practice)

1.Which kinds of fabric can be dyed in substitute alkali? And which color can be dyed into?

Answer: it can be used for dyeing cotton fabric. And it can be used to dye any color of the cotton fabric.

2.How can we do if the discoloration has appeared on the fabric when we dye using substitute alkali?

Answer: The reasons for discoloration is various. And the following three aspects can be used in checking alkali.
Firstly: Check the weight of the substitute is proper or not. The substitute is high concentration alkali. If there is a mistake on the fabric, the discoloration will occur.
Secondly: check the holding times is enough or not. In general conditions, the holding time for bright color fabric is about 45 mins. And 60-70 mins for dark color. If the hold time is not enough, the dyes will not be fixed completely. After soaping, the color will become light than expected.
Thirdly: Check the adding of sodium carbonate or not. Because the substitute alkali is high concentration alkali. It has high requirement on the dyer’s technical level. In order to keep the quality of fabric, we should add 10% sodium carbonate in the process of dyeing bright fabric. And 15% for dark fabric.

3. What should we do when the dyeing defect occurs?

Answer: the reason for dyeing defect is various. Such as the incomplete preliminary treatment. Adding leveling agent or not for different structure fabric. The another important reason is too fast temperature rise. If too fast, the partial increase in the vat will cause dyeing defect. Normally, 1℃ in one minute.

4. Is there any influence on the fastness of the fabric if we using substitute alkali?

Answer: no. It is similar of the fastness of the fabric for substitute alkali and sodium carbonate.

Alkali Substitute/Organic Substitution Alkali for Dyeing 071

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【Brief information】

1.HT-071 is a brand new alkali substitute by advanced technology of EU and US.

2.Amount of HT- 071 is only 1/10 of soda ash, and better washing and rubbing fastness than that of soda ash.

3.Saves water and energy while HT- 071 requires 2 to 3 times washing and soda ash requires at least 4 times.

4.Lower COD that lowers ETP cost and achieves cost saving and environment protection.

【Main composition】Alkali compound of organic and inorganic substances.

【General properties】

Appearance: white powder

pH: 10.5 – 11.5 (1% solution)

Ionicity: nonionic

Solubility: easily soluble in water

Stability: stable to acid, alkali, electrolytes and hard water

【Product features】

1.An optimized alkali substitute with excellent buffer performance that can replace soda ash while the amount is only 1/10 of soda ash in cellulose fibres and their blends dyeing with reactive dyestuffs. Meanwhile, confers controllable synchronous dyeing and fixing.

2.Does not cause white spots due to low quality water with high concentration of calcium and magnesium ions, or residual carbonates from incomplete washing of soda ash.

3.Easy dilution and operation with low cost.

4.Suitable for all kinds of equipments and various reactive dyestuffs with synchronous dyeing and fixing at different water ratio.

【Application】

Dilution: weighs exact amount and dilutes 10 times in auxiliary tank before dyeing tank.

Dosing: does slowly add 1/3 of the amount, and then adds the leaving 2/3 at a time.

Dosage: 1/10 of soda ash

Dipping: calculates at water ration while bath ratio is above 10 and O.W.F while bath ratio is below 10.

【Packaging and storage】

25 kg/bag, 12 months in sealed packing at room temperature and keeps off moisture

【Notes】

The data contained in this literature are based on our current knowledge and experience. It is imperative that it be tested to determine, to your satisfaction, whether it is suitable for your intended use and application. We shall not take any responsibility in any situation for improper use.

【Sample supply】

If you need samples for testing, please feel free to contact us, we will recommend suitable products according to your requirement.