When evaluating Jacquard curtains, the fabric weight (GSM - Grams per Square Meter) is a primary indicator of quality; for premium wholesale, aim for 250-400 GSM. Pay close attention to the yarn-dyed weaving process, which ensures the pattern is integrated into the fabric rather than printed, providing superior colorfastness (Grade 4 or higher) and durability. Additionally, verify the composition (e.g., 100% Polyester or Poly-Cotton blends) to ensure the fabric meets the desired balance of wrinkle resistance and aesthetic drape.