Dyeing Of Cotton Fiber Cloth Amongst Sulpher Dye

Theory: Water insoluble dyes bring to live converted into H2O soluble from (leuco from). Sulpher dye is a insoluble dye. Then lecuo from is colorless from alongside an alkali metal liquor. This color returns afterward oxidation.  This conversation (insoluble soluble) is carried out past times dilate aqueous solution of sodium sulphide.

Dye Type : Sulpher Dye
Fabric type :Cotton
Color : Ash

This leuco chemical compound bring affinity toward cellulosic fiber in addition to they are sensitive to atmosphere oxygen. This reduced from of sulpher dyes absorbed past times fiber nitty-gritty in addition to dyeing occurred in addition to lastly over again converted into insoluble from of dye past times chemic oxidation alongside Na/K dichromate.

Dye – southward – southward – Dye + 2[H] → Dye – SH + dye – SH

Dye – SH + [O] → Dye – southward – southward – Dye + H₂o

Recipe:

Sulpher Dyes = 8%

Na₂CO₃ = five g/l

Na₂S = 8 g/l

Wetting agent = 1 g/l

Sequestering agent = 1 g/l

Temp = 85°C

Time = forty min

Sample weight =5 gm

P^h =10

Neutralization:

CH3COOH = 1 g/l

K₂Cr₂O₇  = 1 g/l

Temp = 50°C

Time = 10 min

Soaping:

Detergent = 1 g/l

Time = 10 2nd

Temp = 95 °C

 Friction of the chemic required:

Wetting agent: It accelerates the wettability of stuff inwards solution so helps to tardily penetration of chemicals into substrate.

Sequestering agent: it ane sort of surfactants surface active agent deed inwards enterprise liquid , enterprise gas or liquid gas interfaces in addition to reduces the interfacial tension.

Reducing agent: The chemic chemical compound which losses electron during chemic reaction. It reduces other substrates chemically peculiarly past times during on electron.

 Recipe calculation:

Dye: 100 gm stuff for  8 gm dye

           1     gm        “     “    8/100 “

            5   gm        “   “         8×5 / 100 “ = 0.4 gm

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

Na₂CO₃  = thou CC water, Na₂CO₃  required = five gm

                    1              “              “               “      =5 / thou “

                    200          “                “             “      = five × 200 / 1000    gm = 1g

Similarity,

Na₂S = 1.6 g/l

Wetting agent = 0.2 g/l

Sequestering agent = 0.2 g/l

CH₃COOH = 0.2 g/l

Detergent = 0.2 g/l

K₂Cr₂O₇  = 0.2 g/l

Curve

                         

Cotton Fabric Dyeing 101

Conclusion: Sulpher dye bring been inwards practical commercial run inwards about of the countries of the Blue Planet for many decades. During mightiness flexibility of application etc. The principal characteristis of this flat of dye of all sulpher dyes, block, bluish in addition to chocolate-brown dyes are the about of import from the standpoint of tonnage.

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