Yes, a 70% cotton 30% polyester blend can shrink when washed and dried, but typically less than pure cotton fabric. Here’s why:
- Cotton fibers shrink when exposed to high heat during washing or drying due to the fibers losing tension. So cotton content in fabric contributes to potential shrinkage.
- Polyester is a synthetic fiber that is designed to resist shrinking. The higher the polyester content, the less shrinkage occurs.
So a 70/30 cotton/polyester blend has potential to shrink due to the natural cotton fibers, but the 30% polyester content will limit the amount of shrinkage.
How Much Will It Shrink?
You can expect a 70/30 cotton/polyester blend to shrink 3-5% on average:
- The cotton portion (70%) would shrink about 5% if it was 100% cotton.
- But the 30% polyester blend lowers the overall shrinkage rate.
The exact shrinkage depends on the fabric quality and washing methods.
To prevent a 70/30 blend from shrinking:
- Wash in cold or warm water, not hot.
- Tumble dry on low heat or hang dry.
- Avoid high heat from ironing as well.
This minimizes shrinkage from the cotton fibers while maintaining the shape.
I hope this gives you a better understanding of how much a 70% cotton 30% polyester fabric can be expected to shrink! Let me know if you need any clarification or have additional questions.