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Thermal expansion describes dimensional change caused by temperature. In polyester textiles, yarn orientation, heat setting and construction strongly affect the final response.

Pressure glazing is the shiny, flattened appearance that can develop when polyester fabric is exposed to excessive heat and pressure during pressing or calendaring.

Thickness can vary along or across a polyester fabric roll due to knitting, finishing, pressure and tension differences. Buyers should sample multiple points.

The ZDHC MRSL controls restricted chemical substances in formulations used during manufacturing, making it relevant to polyester dyeing, printing, coating and finishing.

Centre-to-selvedge GSM variation occurs when fabric density is not uniform across the width, affecting cutting consistency and garment appearance.