Spreading must achieve a number of specific objectives:
1. Shade sorting of cloth pieces
Lays commonly require more than one roll of cloth and lays which include several colours normally require more than one roll of each co lour to achieve enough plies in total. It is likely that cloth pieces that are nominally the same co lour will have been dyed separately and are not an exact shade match.
A garment made from parts cut from these different pieces would be likely to show a shaded effect between its different panels. Thus when deliveries of a number of rolls of cloth of the same co lour are received, they should be sorted into batches such that shade differences between them are undetectable.
Correct ply direction and adequate lay stability
These two factors must be considered together as the opportunities for achieving them are related. They depend on fabric type, pattern shape and the spreading equipment that is available.
Methods if spreading which lay alternate plies in different directions can only be used for either way fabrics. In this case the pattern pieces can face in either direction in the marker and the following opportunities are available:
- For symmetrical pattern pieces, and fabric which is suitable spread face to face, the fabric can be spread along face up and immediately back again face down.
- For symmetrical as well as symmetrical pattern pieces, and fabric which is stable spread all the same way up, the fabric can be spread along and immediately back again but the roll must be turned on a turntable before returning.
- For asymmetrical as well as symmetrical pattern pieces, and fabric which is stable all the same way up, the spreader spreads in one direction only and ‘dead heads’ back to spread the next ply in the same direction.
- For symmetrical pattern pieces, and fabric which is stable face to face, the spreader spreads in one direction only but after ‘dead heading’ back, a turntable is required to rotate the roll before the next ply is spread in the same direction.