Lot Shade Variation: Lot Shade Variation (缸差)
A colour difference between separate dyeing or moulding lots of the same reference. It arises from raw material variation, bath concentration, temperature control and machine differences. In bulk orders, mixed lots can produce visible panels in garments, so shade grouping and lot tracking are essential. Buyers specify acceptable tolerance and may require a single lot for one order. Approved shade samples are retained for comparison and dispute resolution.