PROJECT - PART 2

25
DYEING WITH VAT DYE DYEING WITH VAT DYE 1

Transcript of PROJECT - PART 2

Page 1: PROJECT - PART 2

DYEING WITH VAT DYEDYEING WITH VAT DYE

11

Page 2: PROJECT - PART 2

RECIPE OF EACH (10GM) KNIT & WOVEN SAMPLE DYESTUFF:

Option 1: Vat dye, Blue color : 1% on the weight of fabricOption 2: Vat dye, Blue color : 2% on the weight of fabricOption 3: Vat dye, Yellow color : 1% on the weight of fabricOption 4: Vat dye, Yellow color : 2% on the weight of fabric

CHEMICALS & AUXILIARIES:NaOH : 7% on the weight of fabricHydrose : 6% on the weight of fabricSalt (NaCl) : 10% on the weight of fabricWetting agent (1% stock soln) : 1 g/lSequestering agent (1% stock soln) : 1 g/lWater : Required amount as calculated below

DYEING PARAMETER:pH : 12M:L : 1:30Temperature x Time : 70˚C x 45 min

22

Page 3: PROJECT - PART 2

DYEING CURVE

33

Page 4: PROJECT - PART 2

OXIDATION AND AFTER TREATMENT OXIDATION RECIPE

When Air oxidation = No mentionable amount as available in environmentWhen H2O2 = 2 gm/l

When Na-perborate = 2 gm/lWhen K2Cr2O7 = 2 gm/l

M:L = 1:30Temperature = 60˚CTime = 20 min

SOAPING RECIPE:Detergent = 2gm / lM:L = 1:30Temperature = 60˚CTime = 15 min

NEUTRALIZATION:Rinsing with 1ml/l acetic acid at 60°C temperature for 10 min. Then wash the fabric with cold water

44

Page 5: PROJECT - PART 2

OXIDATION AND AFTER TREATMENT CURVE

55

Page 6: PROJECT - PART 2

66

Page 7: PROJECT - PART 2

COLOR FASTNESS TO WASHShade Fabric type Oxidation with Color fastness to Washing

Color changing Color staining

2%, blue Knit

H2O2 4 4-5

Na-Perborate 3-4 4-5Air 4 4-5K2Cr2O7 3 4-5

2%, blue Woven

H2O2 4 4-5Na-Perborate 3-4 4-5Air 4 4-5K2Cr2O7 3-4 4-5

2%, yellow Knit

H2O2 4-5 4-5Na-Perborate 4 4-5Air 4-5 4-5K2Cr2O7 3-4 4-5

2%, yellow Woven

H2O2 4-5 4-5Na-Perborate 3-4 4-5Air 4 4-5K2Cr2O7 3-4 4-5

77

Page 8: PROJECT - PART 2

RESULT ANALYSIS OF COLOR FASTNESS TO WASH

88

Page 9: PROJECT - PART 2

COLOR FASTNESS TO WATER

99

Shade Fabric type Oxidation with Color fastness to waterColor changing Color staining

2%, blue Knit

H2O2 4 4-5Na-Perborate 3-4 4-5Air 4 4-5K2Cr2O7 3-4 4-5

2%, blue Woven

H2O2 4 4-5

Na-Perborate 3-4 4-5Air 4 4-5K2Cr2O7 3-4 4-5

2%, yellow Knit

H2O2 4-5 4-5Na-Perborate 4 4-5Air 4 4-5K2Cr2O7 3-4 4-5

2%, yellow Woven

H2O2 4-5 4-5Na-Perborate 3-4 4-5Air 4-5 4-5K2Cr2O7 3-4 4-5

Page 10: PROJECT - PART 2

RESULT ANALYSIS OF COLOR FASTNESS TO WATER

1010

Page 11: PROJECT - PART 2

COLOR FASTNESS TO RUBBING

1111

Shade Fabric type Oxidation withColor fastness to Rubbing

Dry rubbing Wet rubbing

2%, blue Knit

H2O2 4-5 3-4Na-Perborate 4-5 2-3Air 4-5 3K2Cr2O7 4 2

2%, blue Woven

H2O2 4-5 3-4Na-Perborate 4-5 2-3Air 4-5 3K2Cr2O7 4 2

2%, yellow Knit

H2O2 4-5 3-4Na-Perborate 4-5 2-3Air 4-5 3K2Cr2O7 4 2

2%, yellow Woven

H2O2 4-5 3-4Na-Perborate 4-5 2-3Air 4-5 3K2Cr2O7 4 2

Page 12: PROJECT - PART 2

RESULT ANALYSIS OF COLOR FASTNESS TO RUBBING

1212

Page 13: PROJECT - PART 2

COLOR FASTNESS TO LIGHT

1313

Shade Fabric type Oxidation with Color fastness to lightColor changing

2%, blue Knit

H2O2 4Na-Perborate 4Air 4K2Cr2O7 4

2%, blue Woven

H2O2 4Na-Perborate 4Air 4K2Cr2O7 4

2%, yellow Knit

H2O2 4Na-Perborate 4Air 4K2Cr2O7 4

2%, yellow Woven

H2O2 4Na-Perborate 4Air 4K2Cr2O7 4

Page 14: PROJECT - PART 2

RESULT ANALYSIS OF COLOR FASTNESS TO LIGHT

1414

Page 15: PROJECT - PART 2

1515

Page 16: PROJECT - PART 2

COST ANALYSIS

1616

Chemicals used in oxidation Current Market Price (Tk) / per Kg

Air Free at environment

H2O226

Na-perborate 2500

K2Cr2O75000

Chemicals used in oxidation Cost in our processing (Tk)for each 10gm sample

Cost of processing (Tk)

of 1Kg fabric

Air 0 02 g/l H2O2 (0.6x26)/1000 = 0.0156 1.562g/l Na-perborate (0.6x2500)/1000 = 1.5 1502g/l K2Cr2O7 (0.6x5000)/1000 = 3 300

Page 17: PROJECT - PART 2

COST OF OXIDATION OF 1 KG FABRICCOST OF OXIDATION OF 1 KG FABRIC

1717

Page 18: PROJECT - PART 2

DECISIONDECISION

1818

Page 19: PROJECT - PART 2

COLOR FASTNESS

1919

Page 20: PROJECT - PART 2

COST ANALYSIS

2020

Page 21: PROJECT - PART 2

SHADE ANALYSIS

2121

Page 22: PROJECT - PART 2

RISK FACTOR ANALYSISRISK FACTOR ANALYSIS

2222

Page 23: PROJECT - PART 2

OXIDATION PRACTICE IN INDUSTRIES

Air oxidation as most economicAir oxidation as most economic Then treatment with fixer to make a surface coating to improve rubbing Then treatment with fixer to make a surface coating to improve rubbing

fastnessfastness Earlier fixer was formaldehyde or melamine based resin but it’s now Earlier fixer was formaldehyde or melamine based resin but it’s now

banned according to REACH protocolbanned according to REACH protocol Now a days formaldehyde free resin like silicon based or polyamide based Now a days formaldehyde free resin like silicon based or polyamide based

fixer are usedfixer are used

2323

Page 24: PROJECT - PART 2

2424

Page 25: PROJECT - PART 2

2525

THANK YOUTHANK YOU