Problem occurring in dyeing due to hardness:
Potential dangers of textile items:
a) Potential dangers:
Potential dangers of textile items:
a) Potential dangers:
1) Reduced depth of shade: Dyeing shade is a vital point of industrial coloration process. Shade of a color is depend upon the choromophore or auxochoromophore groups of dyes. The material reserved in hard water can change the choromophore complex ions. In that case it is not possible to get desire shade percentage.
2) Dulling of shade: This is a big problem in dyeing. Water hardness change the activities of dyes chemical that’s why dyeing machine could not properly dull the shade.
3) Unleveled dyeing: It is one of the common and major problem in dye house. It means the variation of color shade in same amount of fabric or other textile material which are dyed in same dyeing bath and batch. Water hardness is one of the main issue of uneven dyeing.
4) Poor shade reproducibility: Shade reproducibility is not a usual operation on dyeing industry. It used to fix the shade according to buyer requirement if it is not up to slandered. It means refit the dyed fabric according to the required shade due to achieve the proper shade. Usually uneven dyed fabric need to shade reproduce. To reduce the shade stripping is required but increase the shade, usually need to re-treatment with dyes and chemicals.
5) Damaged fiber: Degree of hydrogen (PH) is important issue in dye liquor. Hard water contains organic salt that’s why it can change the acidity or alkality of dye and auxiliary solution. On the other hand every fibre have a tolerant limit of acid alkali. As the hard water change the PH of dye solution so the solution could be harmed the fibre. I we rework with dyed material due to dull or unleveled shade, it could easily damage the textile fibre due to more chemical expose.
b) Problem in boiler:
-Scale formation: Hard water makes scales inside the wall and tubes of boiler. It create a layer of organic salt and it is difficult remove the scale inside the boiler.
-Heat loss: It also the cause of heat loss inside boiler.
c) Wastage of soap: Hard water contains the organic salt and oxides ions. Those ions react with soap and reduce the working capability soap and need more soap to maintain the exact ratio during scouring and bleaching.
d) Problem in machine: It makes corrosion of boiler and looses its life time.
e) Problem in processing:
Desizing, Scouring, Dyeing, Printing, Finishing
2) Dulling of shade: This is a big problem in dyeing. Water hardness change the activities of dyes chemical that’s why dyeing machine could not properly dull the shade.
3) Unleveled dyeing: It is one of the common and major problem in dye house. It means the variation of color shade in same amount of fabric or other textile material which are dyed in same dyeing bath and batch. Water hardness is one of the main issue of uneven dyeing.
4) Poor shade reproducibility: Shade reproducibility is not a usual operation on dyeing industry. It used to fix the shade according to buyer requirement if it is not up to slandered. It means refit the dyed fabric according to the required shade due to achieve the proper shade. Usually uneven dyed fabric need to shade reproduce. To reduce the shade stripping is required but increase the shade, usually need to re-treatment with dyes and chemicals.
5) Damaged fiber: Degree of hydrogen (PH) is important issue in dye liquor. Hard water contains organic salt that’s why it can change the acidity or alkality of dye and auxiliary solution. On the other hand every fibre have a tolerant limit of acid alkali. As the hard water change the PH of dye solution so the solution could be harmed the fibre. I we rework with dyed material due to dull or unleveled shade, it could easily damage the textile fibre due to more chemical expose.
b) Problem in boiler:
-Scale formation: Hard water makes scales inside the wall and tubes of boiler. It create a layer of organic salt and it is difficult remove the scale inside the boiler.
-Heat loss: It also the cause of heat loss inside boiler.
c) Wastage of soap: Hard water contains the organic salt and oxides ions. Those ions react with soap and reduce the working capability soap and need more soap to maintain the exact ratio during scouring and bleaching.
d) Problem in machine: It makes corrosion of boiler and looses its life time.
e) Problem in processing:
Desizing, Scouring, Dyeing, Printing, Finishing
Wish you good luck-------------------------------------------
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