Unwanted waviness of the fabric along the seam line is called seam pucker. This may be apparent immediately after sewing or it may develop in later in use. Most of the times, sewing threads are referred as the responsible for seam pucker. But without sewing threads, there are so many reasons for occurring seam pucker. Such as fabric structure, seam structure, needle size, feeding problem, uneven thread tension and so on. This can be seen after sewing and sometimes after washing of garments. There is a great possibility of seeing seam pucker in case of more piles of fabrics sewing together. The following are the main reason of occurring seam pucker.
1. Variable or uneven stretch on fabric piles:
●There is a great possibility of seeing seam pucker in case of more piled of fabrics sewing together.
● Due to variable stretch on fabric piles they will not feed equally to sewing m/c & create seam pucker.
● this type of pucker is seen for the limitation of feed mechanism.
2. Fabric dimensional instability:
● If the shrinkage of sewn fabric piles are not same or equal than seam pucker will create after washing.
● To avoid this. It must be know the shrinkage property of different types of fabrics before sewing.
● If the shrinkage percentage of area of two pieces fabrics is more than 2, then seam pucker will occur after sewing the fabrics together.
3. Sewing threads shrinkage:
● Due to variable shrinkage percentage of sewing thread & fabric, seam pucker will create after washing or ironing.
● To protect this. It must know about the shrinkage percentage of fabric & thread before selection to sew.
● There is less possibility of occurring seam pucker when sewing is done by synthetic threads due to less shrinkage percentage of them.
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