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  In accordance with the CIE DE2000 visual threshold standard, under the D65 standard light source, the minimum color difference that the human eye can stably distinguish is ΔE 2‑5. Color deviations below this range are almost imperceptible to the naked eye. Relying on manual visual judgment for color sorting in mass industrial production is

Food color is the most direct factor for consumer purchase decisions. Unstable colors of fruits and snacks weaken market competitiveness greatly. Customers even doubt food freshness with abnormal colors. Traditional manual sensory checks have poor repeatability and low accuracy. They cannot quantify subtle color differences for standardized food production. The Sanyuanse handheld spectrophotometer supports full

Paint color inconsistency is a common quality problem in coating production. Manual visual judgment cannot meet modern industrial quality requirements. Human eyes can only distinguish color deviation with ΔE＞1.12 under D65 standard light source. According to ASTM E1164 and ISO 7724 paint color measurement standards, formal paint color difference testing must use professional spectrophotometers. Sanyuanse

Spectrophotometer and spectrocolorimeterare two main devices for industrial color control. Many global buyers confuse the two types and make wrong purchase decisions. The core difference lies in testing principle and data precision. A spectrocolorimeteronly outputs CIE‑LAB and ΔE values. It uses pre‑set filter groups to calculate color data. Its test accuracy is limited for high‑end