When sourcing porcelain, distinguish between Standard Porcelain, New Bone China, and Fine Bone China. Fine Bone China contains at least 25-40% bone ash, offering the highest translucency and chip resistance. For a 'Porcelain White' set, ensure the whiteness index is consistent across all pieces. Check for glaze uniformity; the surface should be free of pinholes, black spots, or 'orange peel' textures. High-quality sets are fired at temperatures exceeding 1,300°C, resulting in a water absorption rate of less than 0.5%, which prevents staining and bacterial growth.