How does the porosity of polyester fabric affect paint adhesion over time?

The porosity of polyester fabric plays a critical role in determining how well paint adheres to its surface over time. Polyester, a synthetic fabric, is known for its low porosity compared to natural fibers like cotton. This characteristic can both help and hinder paint adhesion.

Initially, the smooth, tightly woven structure of polyester may resist paint penetration, leading to poor adhesion if not properly pre-treated. However, when the fabric is slightly porous or treated with a primer, paint can bond more effectively. Over time, environmental factors like humidity, UV exposure, and wear can cause the paint to crack or peel if the adhesion is weak.

For long-lasting results, artists and manufacturers often use fabric-specific paints or additives to enhance adhesion. Understanding the relationship between polyester's porosity and paint durability ensures better outcomes in textile painting projects.