How to Wash Denim Fabric
Many beginner sewists are intimidated by denim. It can be a thick fabric that is difficult for some sewing machines to handle, but a simple project such as a tote bag is a good start.
Before you sew denim, however, you need to know how to wash it.
Why Pre-Wash Denim?
Traditional dark blue denim achieves its color through a heavy amount of indigo dye. There will always be excess dye left in the fabric, and it is important to wash denim yardage before sewing in order to remove the extra dye.
Dye transfer can happen from denim, either on to skin or on to other clothing. Do not take the chance of ruining a different garment because you have not properly pre-washed your denim.
Pre-washing is also important because it will shrink the fabric. It is better to shrink fabric before it is cut and made into a garment.
What is the Best Detergent for Denim?
You should use a pre-washing detergent that is the same as your post-garment detergent. Do research on the best choice detergent for you.
What is the Best Wash Cycle for Denim?
To extend the life of your garment, cold water washes will damage the fabric the least. However, they will also shrink the fabric the least. If you feel there is danger of your final garment being washed on hot, you should also wash your yardage on hot. Always treat your yardage in the way you believe your final garment will be handled.
Denim yardage can be air dried or tumble dried low. Tumble dry will reduce wrinkles and increase softness.
How Many Times Should I Pre-Wash Denim?
Denim yardage should be washed and dried at least two times in order to remove all the excess dye. It should always be washed alone (or with other similar colors of denim) to avoid dye transfer.
Threads Magazine recommends washing three times, and also has some good advice regarding denim with spandex.
Does Denim Fade?
Yes, denim continues to fade with every wash due to the amount of dye in the fabric. Fading is a completely normal process with denim. After a garment is sewn with denim, it will fade more along stitching lines, seams, and edges such as hems. Washing on cold and air drying can reduce the amount of fading, but not halt it completely.
Want to Try Denim?
LA Finch Fabrics carries only the best quality denim from the LA garment district. Find our current denim selections by clicking here.