Polyester Content: Polyester fibers are known for their excellent color retention properties. They have high resistance to fading caused by exposure to sunlight, washing, and general wear and tear. When blended with cotton, which is also relatively colorfast, the resulting fabric maintains its color vibrancy for a longer period.

Durability: Polyester cotton fabric is generally more durable than pure cotton fabric. The polyester fibers add strength and resilience to the fabric, which helps prevent color fading due to friction, abrasion, or frequent washing.

UV Resistance: Polyester fibers have inherent resistance to ultraviolet (UV) radiation, which can cause color fading in fabrics over time. When combined with cotton, polyester helps to shield the cotton fibers from UV damage, thus enhancing the fabric's overall resistance to fading.

Finishing Treatments: Manufacturers often apply finishing treatments to polyester cotton fabrics to enhance their color retention properties further. These treatments can include UV inhibitors or color-fastening agents, which help to lock in the dyes and prevent them from fading prematurely.

Washing and Care: Polyester cotton fabric is generally easy to care for, and proper washing techniques can help maintain its color vibrancy. Washing in cold water with mild detergent and avoiding bleach can help prevent color fading. Additionally, turning the fabric inside out before washing can minimize friction and abrasion on the outer surface, reducing the risk of color loss.

Drying Methods: Air-drying polyester cotton fabric is preferable to using a dryer, as high heat can accelerate color fading. If using a dryer, it's advisable to use a low heat setting or to remove the fabric from the dryer while still slightly damp to minimize heat exposure. Hanging polyester cotton garments in the shade to dry can also help preserve their colors.

Quality of Dyes: The quality of dyes used in polyester cotton fabric can vary depending on the manufacturer and the intended application. Higher-quality dyes are more resistant to fading and can withstand repeated washings without losing their color intensity. When purchasing polyester cotton fabric, it's essential to consider the reputation of the brand and the quality of their dyeing processes.

Environmental Factors: Exposure to environmental pollutants, such as air pollution and cigarette smoke, can contribute to color fading in polyester cotton fabric. Limiting exposure to these pollutants and storing garments in a clean, dry environment when not in use can help maintain their color brightness over time.