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writeup on backtak
Automatic back-tack system for industrial sewing machine

What is backtack?

Backstitch/backtack/ backtrack and its variants stem stitch, outline stitch and split stitch are a class of embroidery and sewing stitches in which individual stitches are made backward to the general direction of sewing.
Applications
Basic backstitch is used to outline shapes in modern cross-stitch, in Assisi embroidery and occasionally in blackwork.

Description of the technique
Backstitch is most easily worked on an even weave fabric, where the threads can be counted to ensure regularity, and is generally executed from right to left. The stitches are worked in a 'two steps forward, one step back' fashion, along the line to be filled, as shown in the diagram.

Neatly worked in a straight line this stitch resembles machine stitching.
The back stitch can also be used as a hand-sewing sewing utility stitch to attach two pieces of fabric together.

Variants
Variants of backstitch include:
Basic backstitch or point de sable.
Threaded backstitch
Pekinese stitch, a looped interlaced backstitch
Stem stitch, in which each stitch overlaps the previous stitch to one side, forming a twisted line of stitching, with the thread passing below the needle. It is generally used for outlining shapes and for stitching flower stems[3] and tendrils.
Whipped stem stitch
Outline stitch, sometimes distinguished from stem stitch in that the thread passes above rather than below the needle.
Split stitch, in which the needle pierces the thread rather than returning to one side.

Stitch gallery

Threaded backstitch

Pekinese stitch

Stem stitch

Whipped stem stitch

Split stitch

Ravelling of stitches
Don't you hate it when the stitches start coming out of the hem on your favourite pants? You can avoid this situation in your own sewing by securing the ends of your seams. Read on to see how simple it is to make sure your stitches never start to come undone.

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