India's leading manufacturers and exporters of textile chemicals such as Soda Ash, which is used as part of the dyeing. Know more!

1. Sarex
Sarex
FEDA-SH
Soda ash substitute in Cold Pad Batch
dyeing

2. Sarex
 Relatively low cost of equipment
 Less surface area
 Low amount of effluent
 No salt residue in effluent water (Conventional exhaust dyeing system emits up
to 1 kg salt per kg of fabric)
 Low steam consumption (Approx. 50 % less)
 Low electricity requirement (30 - 40 % less)
 Improved fabric quality
 Reduced labor cost
Benefits of Cold Pad Batch (CPB)

3. Sarex
 Sodium silicate solution is used in CPB dyeing to produce a high pH in
order to fix reactive dye on cotton or silk
 Purpose of the Sodium silicate is to raise the pH to approximately 11.0
 Disadvantages of Sodium silicate
Sensitive to water hardness
Handle impairment
Reduction in absorbency
Blocking of pipes
 Not suitable in the process house which are using RO plant for effluent
treatment
 The most commonly used chemical to make highly alkaline pH is Soda ash
 Soda ash comes with drawbacks of high TDS, BOD and COD
Need of Sodium silicate

4. Sarex
 Feda-SH is a highly effective soda ash substitute
 It is used for fixation of all type of reactive dyes on cellulosics.
 It decreases the reactive dye hydrolysis and hence increases the degree
of dyeing
 It is a highly effective soda ash substitute
 It shows predominant buffer action and it disperse evenly in dye solution
 It has high rate of fixation
 Advantage: Low TDS, BOD and COD
FEDA-SH - INTRODUCTION

5. Sarex
Key Features Benefits
Reduces reactive dye
hydrolysis
Enhanced degree of dyeing
Ecofriendly Low TDS, COD and BOD value
KEY FEATURES AND BENEFITS

6. Sarex
Physical appearance White to off white powder with granules
Ionic nature Nonionic
pH of 1 % solution 13.0 ± 1
Miscibility Soluble in water
Compatibility Compatible with cationic ,anionic and non-ionic
products
Stability Stable to dilute acids and dilute alkalies
CHARACTERISTICS

7. Sarex
Stepwise procedure for Cold pad batch
1. Pad the fabric at 70% expression
2. Batch for 16hrs
3. Hot wash at 90°C for 20 min.
4. soaping with 2g/l Sarakol-1583 at 95°C for 20 min.
5. Evaluate washing fastness of dyed fabrics as per ISO 105 C10 at 60°C
Concentration:
Conventional: Sodium silicate: 35g/l (108 deg T)
Sarex Recipe: Feda-SH: 10-20g/l

8. Sarex
RESULTS:
Washing fastness by ISO 105 C10
Dye : Reactive Corazol Red 5B

9. Sarex
RESULTS:
Washing fastness by ISO 105 C10
Dye : Reactive Corazol Black GSN

10. Sarex
RESULTS:
Washing fastness by ISO 105 C10
Dye : Reactive Turquoise Blue H2GP

11. Sarex
Sarex
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