Classic models often involve water washing effects. How do you guarantee batch-to-batch color consistency with your washing processes (such as stone washing and enzyme washing)?

Technical Response: Consistency in washing effects is achieved through automated process standardization and digital colorimetric monitoring, ensuring color consistency between batches. High-end manufacturers use automated feeding systems to ensure precise chemical ratios, locking in key parameters such as liquor ratio, temperature, and mechanical action (speed). Unlike entry-level factories that rely on manual supervision, leading suppliers use spectrophotometers to maintain strict color tolerances (by measuring DE values) within industry standard ranges. While smaller suppliers often experience color variations due to water hardness or temperature fluctuations, advanced factories use standard lightboxes and physical samples to ensure visual consistency across global shipments.