Overlock Machines

Thread used to overcast edges of fabric should "blend" with fabric (light threads on light colors - darks on dark fabric).
Due to the number of spools of thread needed on an overlock machine - all do not need to match exactly.  The thread which stitches the seam (if used) should match the fabric as in regular machine sewing.

SECURING CHAIN ENDS

* Unweave tail chain - tie ends into knots.

* Thread chain tail through a large eyed needle and bring tails back through the seam stitches.

* Use "Fray-check" or similar product.

* Or secure when sewing over the end with another line of stitching.

* Stitch width should be appropriate for fabric - with balanced tension.  Upper and lower looper threads should lie flat on their respective sides and lock with each other on the edge of fabric.

With overlock machine - you can do a seam finish on the edge of each seam.  The cutter blade will make the seam less then 5/8", but this is acceptable.

In some cases - seam and edge finish is done in one step leaving seam allowance about 1/4" wide - this is also acceptable if appropriate for the style of garment.