Tuesday, March 27, 2012

Garments defects (Part 4)

Presented By : Shourov Hasan

Garment defects, classified according to the various manufacturing stages are:

Spreading defects in garment:

Not enough plies to cover quantity of garments required. Plies misaligned, resulting in garment parts getting cut with bits missing in some plies at the edge of the spread. Narrow fabric, causes garment parts at the edge of the lay getting cut with bits missing. Incorrect tension of plies, i.e. Fabric spread too tight or too loose. This will result in parts not fitting in sewing, and finished garments not meeting size tolerances. 

Not all plies facing in correct direction (whether 'one way' as with nap, or 'one way either way' as with some check designs). This happens when fabric is not spread face down, face up, or face to face as required. Unacceptable damages in the garment parts. Parts not fully included owing to splicing errors. Spread distorted by the attraction or repulsion of plies caused by excessive static electricity. Plies are not spread accurately one above another for cutting. This results in mismatching checks.

Cutting defects in garment:

Failure to follow the marker lines resulting in distorted garment parts. Top and bottom plies can be a different size if the straight knife is allowed to lean, or if a round knife is used on too high a spread. Notches, which are misplaced, too deep, too shallow, angled, omitted, or wrong type to suit fabric .drill marks, which are misplaced, wrong drill to suit fabric, omitted, not perpendicular through the spread. 

Frayed edges, scorched or fused edges, caused by a faulty knife, not sharp enough, or rotating at too high a speed. Knife cut. Garment part damaged by careless use of knife, perhaps overrunning cutting previous piece. Marker incorrectly positioned on top of spread. Garment parts have bits missing at edge of lay. If too tight or too loose then garment parts are distorted. Slits opened inaccurately or omitted.

Garment twist

A rotation, usually lateral, between different panels of a garment resulting from the release of latent stresses during laundering of the woven or knitted fabric forming the garment. Twist may also be referred to as torque or spirality.


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