SlideShare a Scribd company logo

Defects of-dyeing

•Download as PPTX, PDF•
•
P
Pragya Dixit

The document discusses common defects that can occur during the dyeing process, including barre, bleeding, crocking, off shade, shade bar, shading, stained, and streaked. It lists several potential causes of dyeing defects, such as improperly prepared materials, impurities not being fully removed, issues with water quality or dye solution preparation, and shortcomings in dyeing machinery. Common defects include horizontal bands or variations in color tone caused by uneven tensions or changes during the dyeing process. Defects can also be caused by stains or residues on fabrics prior to dyeing.

1 of 12
Downloaded 69 times
Defects of Dyeing
Causes Of Dyeing Defects 1. The material is not well prepared for dyeing and printing a. Material having dead fibres or other defective fibres b. Left over of Chemicals after bleaching etc. c. Material not properly desized d. Material not properly mercerized. e. Absorbency of the fabric not proper f. Sticking of insoluble material on the fibres g. Impurities are not removed properly h. Uneven heat treatment. 2.Water Quality not Proper a. More Hardness of water b. Water has metal ions such as iron. c. pH of water not proper d. Water having more chlorine
3. Due to Shortcomings in making Dyeing Solution a. Improper weight ratio of colors, material and chemicals. b. Improper material to water ratio c. Improper filtering of concentrated colors. 4. Due to Shortcomings in the dye machinery a. Coming out of Dye liquor during dyeing b. Defective instruments controlling temperature, pressure speed etc
Barre • Its horizontal shaded band across the width of the fabric • It may be caused by variation in the size of the filling yarn and by the differences in tension of either the filling or warp yarns.
Bleeding • It’s a loss of color when the dyed fabric is wetted or emerged in water. • The water here, becomes colored and may cause discoloration of other fabrics. • This is usually due to either improper dye selection or poor dye fastness.
Crocking • It is the rubbing off of the color. • It may rub onto another fabric. • This may be due to inadequate scoring subsequent to dyeing.
Off Shade • It refers to color that doesn't exactly match the standard or the prepared sample. • This may be due to faulty dye foundation or application or may be due to variation in dye lot.
Shade Bar • It is a horizontal band of a different hue running across the fabric. • It may be caused by a change of filling bobbin in the loom or a loom stop and start up
Shading • It is a variation in color tone either horizontally or vertically. • It is generally due to uneven tension on the fabric.
Stained • It indicates a discoloration caused by a foreign substance, dirt, grease, oil or sizing residue on the fabric being dyed.
Streaked • This type of defect on the fabric indicates either a stain or uneven dyeing caused by folds in the fabric during the dyed process.
THANK YOU BY: Shah Twinkle Raghav Sharma Ravi Kant

More Related Content

Defects of-dyeing

  • 2. Causes Of Dyeing Defects 1. The material is not well prepared for dyeing and printing a. Material having dead fibres or other defective fibres b. Left over of Chemicals after bleaching etc. c. Material not properly desized d. Material not properly mercerized. e. Absorbency of the fabric not proper f. Sticking of insoluble material on the fibres g. Impurities are not removed properly h. Uneven heat treatment. 2.Water Quality not Proper a. More Hardness of water b. Water has metal ions such as iron. c. pH of water not proper d. Water having more chlorine
  • 3. 3. Due to Shortcomings in making Dyeing Solution a. Improper weight ratio of colors, material and chemicals. b. Improper material to water ratio c. Improper filtering of concentrated colors. 4. Due to Shortcomings in the dye machinery a. Coming out of Dye liquor during dyeing b. Defective instruments controlling temperature, pressure speed etc
  • 4. Barre • Its horizontal shaded band across the width of the fabric • It may be caused by variation in the size of the filling yarn and by the differences in tension of either the filling or warp yarns.
  • 5. Bleeding • It’s a loss of color when the dyed fabric is wetted or emerged in water. • The water here, becomes colored and may cause discoloration of other fabrics. • This is usually due to either improper dye selection or poor dye fastness.
  • 6. Crocking • It is the rubbing off of the color. • It may rub onto another fabric. • This may be due to inadequate scoring subsequent to dyeing.
  • 7. Off Shade • It refers to color that doesn't exactly match the standard or the prepared sample. • This may be due to faulty dye foundation or application or may be due to variation in dye lot.
  • 8. Shade Bar • It is a horizontal band of a different hue running across the fabric. • It may be caused by a change of filling bobbin in the loom or a loom stop and start up
  • 9. Shading • It is a variation in color tone either horizontally or vertically. • It is generally due to uneven tension on the fabric.
  • 10. Stained • It indicates a discoloration caused by a foreign substance, dirt, grease, oil or sizing residue on the fabric being dyed.
  • 11. Streaked • This type of defect on the fabric indicates either a stain or uneven dyeing caused by folds in the fabric during the dyed process.