yudacentury

06/10/2026

06/10/2026

Chitosan for Fabric Pre-treatment (Before Dyeing)

Chitosan: Eco-friendly Auxiliary for Fabric Pre-modification in Dyeing

Process stage: After desizing/scouring, before formal dyeing. Cationic pre-treatment for grey fabric.

Functions
Chitosan is a natural cationic biopolymer. After fabric treatment, plenty of amino positive charges are introduced onto fiber surfaces. Cellulose fibers (cotton/linen) carry negative charges. After modification with chitosan, fiber surface charge is reversed. Anionic reactive dyes & direct dyes can be adsorbed via static attraction, greatly improving dye uptake, enabling low-salt / salt-free dyeing. It cuts massive inorganic salt used in conventional dyeing and reduces salinity of wastewater.
It also optimizes level dyeing performance, prevents color unevenness, and improves final color fastness, especially for natural plant dyeing.

Dosage & Application Process

1. Prepare working solution: Dissolve chitosan in 1% acetic acid solution to make 0.5~1.0 g/L chitosan liquor.
2. Method: Two-dip two-nip, pick-up rate:70%~85%.
3. Temp & time: Dip at 50~60℃ for 30 min; dry at 80~90℃, cure at 120~130℃ for 2~3 min.
4. Recommended dosage (owf, on weight of fabric): 0.5%~1%.

Applicable textiles
Pure cotton, cotton-linen blend, viscose, Tencel and other cellulosic fabrics.

Highlights
Replaces traditional chemical cationic modifiers; reduces sodium sulphate consumption, lowers salt load of dye-house wastewater; fully biodegradable and compliant with EU environmental regulations.
treatment

Yudacentury As a supplier of chitosan application solutions with 24years experience.
Our main products: chitin, , Chitosan, , Chitosan Lactate, .
chitosan
With origin: Chitosan Fresh North Atlantic Shrimp Shell/Crab Shell Origin
Chitosan Niger Origin
Get free samples here：
www.healthyuda.com

06/10/2026

for & Dyeing Wastewater Treatment
Chitosan: Bio-based Flocculant & for Dyeing Wastewater

Process stage: End-of-pipe wastewater treatment in dye plant, flocculation tank.

Functions
As cationic high-molecular polymer, chitosan neutralizes negatively charged dye colloids and suspended solids in wastewater. It adsorbs dye molecules to realize fast flocculation & sedimentation, achieving decolorization, COD reduction and heavy metal removal. Meanwhile it optimizes sludge characteristics and assists sludge dewatering.
Compared with traditional PAC/PAM, chitosan is bio-based, produces non-toxic sludge for further resource utilization. Suitable for high-chroma dyeing wastewater.

Dosage & Application Process
1. Prepare 0.5% chitosan stock solution with acetic acid in advance.
2. Adjust pH to 4.

sample is for free.
[email protected]
whatsapp:8615506391635

01/10/2026

for big bags with 500kgs each bags. from yudacentury 24 years chitosan manufacturer get sample here [email protected] whatsapp:8615506391635

01/10/2026

Chitosan application dosage in Textile &Dyeing industry

Application Scenario Recommend
Viscosity(1% HAC) DDA(degree of deacetylation) Recommended
Dosage Key process note

/pre-treatment (reactive dyes &natural plant dyes)
100-250mpa.s 85-90% Padding:1-3g/L;
Exhaust:1-2% o.w.f Double‑dip & double‑nip, pick‑up rate 70‑100%. Use citric acid cross‑linker to improve wash resistance. Suitable for cotton, wool and silk.
color fixing 80-200 mpa.s >88% Working bath:1-2g/L Apply after dyeing to block free anionic dyes and enhance wash fastness. Avoid high viscosity to prevent stiff fabric handle.
Anti-bacterial/Anti-wrinkle
Finishing(padding) 80-150 mpa.s 85-90% Padding bath: 2-4g/L;Exhaust:2-3% o.w.f Citric acid cross‑linker is required. Dry at 90‑100 °C, cure at 120‑130 °C. Performance drops sharply without cross‑linking after washing.
Pretreatment for digital printing 60-150 mpa.s >85% 0.5-1.5g/L Improve ink adsorption and reduce ink bleeding. Too high viscosity may cause nozzle clogging.
Printing paste compounding(blended with sodium alginate) 150-300 mpa.s >85% 3-8% of total paste weight o not use chitosan alone as printing paste. Blending improves pattern sharpness and adds antibacterial property.
Warp sizing auxiliary (blended with starch/PVA) 50-120 mpa.s >85% 2-5% of total sizing mass Low viscosity for good pe*******on. Inhibit bacterial growth in sizing tank. High viscosity leads to poor pe*******on and stiff size film
Flocculation &decolorization for dyeing wastewater 300-600 mpa.s >85% Dosing rate：20-50 mg/L High‑molecular‑weight grade for better flocculation & sedimentation. Optimal pH: 4‑6. Performance can be enhanced with magnesium salt.

General Selection Guidelines for Customers

1. Fabric treatment (mordanting, color fixing, antibacterial finishing, digital‑print pretreatment): prefer medium‑low viscosity 60‑250 mPa·s, DDA 85‑90%. Viscosity above 300 mPa·s tends to produce stiff fabric handle.

2. Waste‑water treatment: prefer relatively high viscosity 300‑600 mPa·s, DDA ≥85%. Higher molecular weight delivers better flocculation and sedimentation.

3. DDA below 80 % results in fewer amino groups, leading to obvious drop‑off in dye adsorption and antibacterial performance. DDA above 92 % increases dissolution difficulty and requires more acetic acid.

4. For all fabric‑related applications requiring wash durability, cross‑linking agent (citric acid) is mandatory. Otherwise chitosan will wash off quickly and lose functionality.

Notes:

These application methods and recommendations are general data derived from experience with printing and dyeing industry customers and are for reference only. Actual results shall be subject to laboratory tests. Dosage and procedures may be adjusted according to your practical application.
& for
Yudacentury As a supplier of chitosan application solutions with 24years experience.
Our main products: chitin, , Chitosan, , Chitosan Lactate, .
chitosan
With origin: Chitosan Fresh North Atlantic Shrimp Shell/Crab Shell Origin
Chitosan Niger Origin
Chitosan bisporus Origin mushroom
www.healthyuda.com 24 years
[email protected] whatsapp: 8615506391635

28/09/2026

Chitosan Seed Coating Agent Formula |
1. Add 200g Yudacentury chitosan powder into 7300ml water and stir thoroughly. Pour in 2500ml of 9% acetic acid solution, blend well and let stand for 1 hour to prepare 10 liters of finished chitosan coating liquid.
2. Dosage: 6–8 liters of the above coating liquid per 100kg seeds.
Yudacentury Seed Coating Test Data
(Data sourced from cooperative client feedback and in-house trial field tests; copying and reproduction prohibited.)
Basic Formula from Yudacentury


Advantages of Chitosan as Seed Coating Agent

1. Excellent film-forming property
Forms breathable and water-resistant coating firmly attached to seeds, no peeling or sticking during sowing.
2. Natural bacteriostatic effect
Inhibits soil-borne fungi causing damping-off and seed rot, cuts down use of chemical fungicides.
3. Boosts germination & root growth
Activates seed enzymes, improves germination rate and seedling uniformity, promotes fibrous root development.
4. Nutrient slow release & drought resistance
Adsorbs trace elements and fertilizers for sustained release; locks moisture to prevent seed dehydration under drought.
5. Eco-friendly & biodegradable
Natural bio-based raw material, fully degraded in soil without residue, ideal for organic farming.
6. Optimizes rhizosphere environment
Favors beneficial microbes around roots, enhances seedling tolerance to cold, waterlogging and continuous cropping obstacles.

Yudacentury is a chitosan application solution supplier with 24 years of industry experience.
Core Product Range: Chitin, Chitosan, Hydroxypropyl Chitosan, Chitosan Hydrochloride, Chitosan Lactate, Carboxymethyl Chitosan.


Raw Material Sources:

- Chitosan from fresh North Atlantic shrimp & crab shells
- Chitosan derived from Aspergillus niger
- Mushroom-origin Chitosan (Agaricus bisporus)

28/09/2026

Chitosan Seed Coating Agent Formula |
1. Add 200g Yudacentury chitosan powder into 7300ml water and stir thoroughly. Pour in 2500ml of 9% acetic acid solution, blend well and let stand for 1 hour to prepare 10 liters of finished chitosan coating liquid.
2. Dosage: 6–8 liters of the above coating liquid per 100kg seeds.
Yudacentury Seed Coating Test Data
(Data sourced from cooperative client feedback and in-house trial field tests; copying and reproduction prohibited.)
Basic Formula from Yudacentury


Advantages of Chitosan as Seed Coating Agent

1. Excellent film-forming property
Forms breathable and water-resistant coating firmly attached to seeds, no peeling or sticking during sowing.
2. Natural bacteriostatic effect
Inhibits soil-borne fungi causing damping-off and seed rot, cuts down use of chemical fungicides.
3. Boosts germination & root growth
Activates seed enzymes, improves germination rate and seedling uniformity, promotes fibrous root development.
4. Nutrient slow release & drought resistance
Adsorbs trace elements and fertilizers for sustained release; locks moisture to prevent seed dehydration under drought.
5. Eco-friendly & biodegradable
Natural bio-based raw material, fully degraded in soil without residue, ideal for organic farming.
6. Optimizes rhizosphere environment
Favors beneficial microbes around roots, enhances seedling tolerance to cold, waterlogging and continuous cropping obstacles.

Yudacentury is a chitosan application solution supplier with 24 years of industry experience.
Core Product Range: Chitin, Chitosan, Hydroxypropyl Chitosan, Chitosan Hydrochloride, Chitosan Lactate, Carboxymethyl Chitosan.


Raw Material Sources:

- Chitosan from fresh North Atlantic shrimp & crab shells
- Chitosan derived from Aspergillus niger
- Mushroom-origin Chitosan (Agaricus bisporus)

24/09/2026

🌕 Happy Mid-Autumn Festival!
Sending you our best wishes for a wonderful holiday with your loved ones.

21/09/2026

,sample is available， high-quality chitosan from Yuda century, gets the best price here.








[email protected]
whatsapp:86 15506391635

17/09/2026

grade oligosaccharide show