Dyeing Of Cotton Fiber Textile Alongside Azoic Dye

Theory: azoic dye are non prepare trend dyes similar reactive dyes. The insoluble azoic colors are synthesized within the fiber past times coupling of 2 private components neither of which is a dye itself. These 2 components are on aromatic diezoniem

solt too an aromatic hydroxyl compound. After diazotization the actual color is developed inwards the substrate. In application of azoic colors, the outset pace is selecting the W suitable diazo too coupling components combination of a detail role is to determine which of the napthols tin mail away hold upwards used inwards conjunction alongside the available diazo components to laissez passer the color closest to the chemic shade too depth.

Fabric type : Cotton
Dye type : Azoic
Color : Orange

Recipe:

1^st pace

Naptholation:

napthol   = 2% (owf)

NaOH    = three g/l

NaCl      = five g/l

Wetting agent = 1 g/l

Sequestering agent = 1 g/l

Levelling agent = 1 g/l

Ph  = 10

Temp = 30°C

Time = fifteen min

Sample weight =5 gm

2^nd step:

Base = 2% (owf)

CH₃COONa= 2 g/l

HCL    = 2 g/l

NaNO₂ = 2 g/l

Wetting agent = 0.5 g/l

Sequestering agent = 1 g/l

Levelling agent = 1 g/l

Temp = 5°C

Time = fifteen min

 

Curve For Azoic dye

Friction of the chemic required:

Wetting agent:

 It accelerates the wettability of stuff inwards solution thence helps to slow penetration of chemicals into substrate. Usually it is used inwards scouring, bleaching & dyeing process. It is available inwards marketplace inwards from of yellowish liquid.

Sequestering agent: 

it i sort of surfactants surface active agent human activity inwards corporation liquid, corporation gas or liquid gas interfaces too reduces the interfacial tension.

Recipe calculation:

Dye: 100 gm stuff for  2 gm naphthol

           1     gm        “     “    2/100 “

            5   gm        “   “       2×5 / 100 “ = 0.1 gm

Water: 200 gm [ m:L = 1:40]

NaOH  ,    M CC water, Carrier  required = three gm

                    1              “              “               “      =3 / M “

                    200          “                “             “      = three × 200 / 1000    gm = 0.6g

Similarity,

NaCL = 1 gm

Wetting agent = 0.2 g/l

Sequestering agent = 0.2 g/l

Levelling agent = 0.2 gm

2^nd process:

Dye: 100 gm stuff for  2 gm base of operations dye

           1     gm        “     “    2/100 “

            5   gm        “   “       2×5 / 100 “ = 0.1 gm

Water: 200 gm [ m:L = 1:40]

NaOH  ,    M CC H2O CH₃COONa  required = 2 gm

                    1              “              “               “      =2 / M “

                    200          “                “             “      = 2 × 200 / 1000    gm = 0.4g

Similarity,

HCL = 0.4 gm

NaNO₂ = 0.4 gm

Wetting agent = 0.1 g/l

Sequestering agent = 0.2 g/l

Levelling agent = 0.2 gm

Conclusion: Azoic dye are ordinarily used for dyeing of cotton fiber although other cellulose fibers, wool too fifty-fifty about synthetic fiber likewise the primary payoff of this dyes is that arrive at an economical means to abtain sure enough shade specially crimson alongside really proficient launder fastness.

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