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.
