Stretch factor for fabric means how much the fabric stretches.
Sewing patterns for elastic fabrics must specify for what type of fabric they were designed: fabric that is elastic in one direction, or on both directions. Also, for every stretch direction, the pattern must include the stretch factor or stretch percentage.
How to determine the stretch factor for our fabric?
- Identify the directions we want to measure the stretch factor on our fabric: DOGS or grain-line
- Take a segment of 20 cm long in the chosen direction. The end of the segment is marked by our thumbs. When the fabric has some kind of border, avoid taking it in our segment.
- The hand with the thumb pointing at 0 (zero) will remain still
- Stretch the fabric pulling only the right hand
- Stretch easily, do not pull to rip the fabric!
- Note the value where our right thumb is pointing
- Look for your value in the table below and see what your fabric stretch factor is.
|HOW MUCH YOUR FABRIC HAS STRETCHED:||THE FABRIC STRETCH FACTOR IS:|
Below are 3 examples of different fabrics. I want to determine the stretch factor on DOGS for all 3 fabrics. Click on pictures to enlarge.