Experiment name :
Dyeing off 100% cotton knit fabric with reactive dye.
Theory: Nowadays
reactive dyes are very popular for textile coloration because of its some
specific properties like colour fastness, wide range of shade, brilliance of
shade and simple application procedure. It reacts with fibre in presence of
alkali and adheres as a part of fibre.
Objective:
1.
To learn about dyeing process of cotton fabric
by reactive dye.
2.
To dye cotton fabric by reactive dye.
Nature of sample:
Pre-treated 100% cotton knit fabric.
Apparatus required:
1.Beakers
2.Glass Rod.
3.Pipette.
4. Measuring Cylinder.
5. Digital Balance.
6. Tri-pod stand.
7. Gas Burner.
8. Thermometer.
9. Pot.
Process sequence
- Collection of pre-treated sample
- Set water level
- Add leveling agent
- Add dye solution
- Add salt solution'
- Add soda ash solution
- Add fabric sample
- Raise the temperature to 60deg C
- Run time for 30 minute
- Bath drop
- Rinsing
- Hot wash at 90deg for 10 minute
- Dry
Table1: Dyeing Recipe
SL
|
Process Parameter
|
Unit
|
Dossing
|
Stock soln:
|
01
|
Levelling Agent
|
g/L
|
1
|
1%
|
02
|
Dyes
|
%
|
2
|
1%
|
03
|
Glauber Salt
|
g/L
|
40
|
15%
|
04
|
Soda Ash
|
g/L
|
10
|
10%
|
05
|
Sample Weight
|
gm
|
5
|
---
|
06
|
M:L
|
-----
|
1:30
|
---
|
07
|
Temperature
|
degC
|
60
|
---
|
08
|
Time
|
min
|
20
|
----
|
Calculation:
Total Liquor = Fabric weight X L [M:L = 01:30]
=
5 X 30
=
150mL
Dye 2% = (Fabric
weight X x%) / stock solution%
=
(5X2%) / 1%
=10mL
Levelling Agent = (Total liquor X 'x'g/L) / (stock
solution% X 1000)
=
(150 X 1) / 1% X 1000
=
15ml
Glauber Salt = (Total liquor X 'x'g/L) / (stock
solution% X 1000)
=
(150 X 40) / 15% X 1000
=
40mL
Soda Ash = (Total liquor X 'x'g/L) / (stock solution% X 1000)
=
(150 X 1) / 1% X 1000
=
15ml
Initial Water = total liquor - (chemical 1 + chemical 2 +
chemical 3 ...)
= 150-
(15+40+15+10) mL
= 150
-80 mL
= 70mL
Process Curve:
Sample Attachment:
Observation/comment: >>>>>>>>>>>
Conclusion: >>>>>>>>>>>
