What are the defects found in fabrics?

Question: I want to know what are the types of defects is found in fabrics and how they occur?

OCS's Answer:

In one of our earlier articles Common fabric faults found in garments some fabric defects have been listed with brief explanation.

You can refer that post to know common fabric faults.

To answer the question, in this post all types of defects have been listed with primary source of defects.

Component and materials	Possible Defects
Materials/fabric	1. Fabric holes 2. Slubs 3. Shading variation 4. Misprints, out-of-register prints, undesired color spots 5. Cut, visible notch mark tears or visible surface repairs 6. Bow or skew exceeding 1.5 percent 7. Double picks 8. Pilling
Cleanliness	1. Soil, Spots, stains or Dust 2. Attached thread clusters
Pressing	1. Burn or scorch marks 2. Glaring shine marks 3. Press marks from camps 4. Absence of pressing when specified 5. Products packaged moist after steam pressing 6. Improper pressing 7. Seams not lined up when specified for center leg crease 8. Loops twisted after pressing 9. Uneven creases after press
Seams and Stitching	1. Twisted, roped, or puckered seams 2. Open or broken stitches 3. Raw edges where covered edges are specified 4. Seams not back stitched or bar tacked when specified 5. Irregular or uneven top stitching 6. Seam grin-through, seam slippage 7. Pinching or any part of product caught in seam or stitches 8. Any exposed drill holes 9. Length of legs off by more than 3/8 inch 10. Stitch count not conforming to specifications 11. Stitch or seam type not conforming to specifications 12. Label is not correctly attached, position and layout 13. Sewn on design attached at incorrect place and sewn not according to specs 14. Double needle stitch on crotch seam is missing 15. Use of monofilament thread, other seams than where specified
Button holes	1. Size is not within specs 2. Ragged edges 3. Uncut button hole 4. Out of alignment or improper button spacing 5. Stitch depth too narrow or wide
Button/Button Sewing	1. Button not securely attached 2. Butler-missing 3. Broken or damaged button 4. Out of alignment or improper spacing 5. Button not matches to specs 6. Lack of support materials on fragile fabric 7. Buttons that crack, chip, discolor, rust, bleed, melt or otherwise cause consumer dissatisfaction when care label is followed
Waistband	1. Uneven in width 2. Excessive fullness, puckering or twisting 3. Closure misaligned 4. Belt loops are crooked
Belt Loops	1. Not fully secure 2. Extend above waistband 3. Missing tacks 4. Color shade not to specs 5. Thread shade not to specs 6. Raw edges showing
Front and back	1. Uneven at bottom hem 2. Under facing showing 3. Pockets conspicuously uneven 4. Darts uneven in length 5. Darts poorly shaped 6. Spot shirring not even right and left sides
Hems	1. Twisted, roped, puckered, pleated, or excessively visible from exterior 2. Uneven in width 3. Uneven length of product unless specified
Pockets	1. Not uniform in size and shape 2. Misaligned horizontally or vertically 3. Crooked 4. Missing bar tack, back tack or rivet where specified 5. Bar tack or rivet not as specified 6. Sewn-in pleats or puckers
Zippers	1. Any malfunction in operation 2. Tape does not match color specs 3. Wavy zipper 4. Exposed zipper that distracts from product's appearance 5. Irregular or uneven stitching on zipper 6. Crooked or uneven zipper 7. Bar tack missing or incorrectly located at bottom or base of zipper
Gripper	1. Misaligned 2. Missing or incorrect 3. Defective in operation
Fly area	1. Width is not uniform 2. Bottom stopper does not securely clinched 3. Top of zipper not caught in band 4. Either side of fly extends past other side by excessive amount.
Labels	1. Labels are not correct, text and/or layout 2. Located at incorrect location 3. Insecurely attached to the garment