Reactive dyeing with white cotton fabric

Wet processing technology lab- ıı

Exp No:  01

Exp Name : Reactive dyeing with white cotton fabric .

Introduction : Reactive dye is the most important method of cellulosic fabric . Reactive dye is covalent bond  with cellulosic fabric  with an excellent color fastness .

Objective :

·        Reactive dyes have good fastness properties 

·        Reactive dyes are most commonly used in dyeing of cellulose fabric

·        Reactive dye any class of highly colored organic substances

·        Dye and fabric are join in covalent bond

·        Reactive dyeing process is easy   

Recipe of Reactive dyeing :

·        M:L         = 1:20

·        Sample     = 5gm

·        Dye            = 4% or =0.4

·        Total water = 5×20 = 100 ml

·        Wetting agent = 2.5 gm/l  = (2.52×100)÷1000 = 0.25 ml

·        Sequestering agent = 2 gm/l = ( 2×100)÷1000 = 0.2 ml

·        Leveling agent    = 2gm/l  =  (2×100)÷1000 = 0.2 ml

·        Salt                  = 80gm/l  = (80×100)÷1000= 8 gm

·        Soda              = 30gm/l  = (30×100)÷1000 = 3gm

·        Time              = 60 minute

·        Temperature = 60°c     

·        Ph                   = 10-11

Figure Reactive dyeing sample :

                         

             

Working Procedure:

·        At first we take a sample dyeing Becker

·        Then take 5gm white cellulosic fabric

·        Now take 100ml water

·         Now add all chemical as wetting agent, sequestering agent, leveling agent, as our recipe chart.

·        Then adds stock- color as we find our calculation

·        Now salt ,soda weight by digital balance. Take as our recipe% of salt soda  

·          Now mixed all chemical then ,wet sample fabric and squished fabric drop water . then the sample fabric put in the beaker  and close this ,now  start dyeing in 60°c and 10-11 ph for 60 minute process this dyeing .

·        After dyeing cool wash this sample fabric and dry this fabric

Conclusion: Reactive dyeing process is easy for cellulosic fabric dyeing. this reactive dyeing process is help me to know how its work and use chemical also know to time ,temperature, PH and after dyeing complete washing process .