International Condition Grades / 国际通用品相等级表 | Grade Grade | Abbreviation / 缩写 | Description / 品相特征描述 | | Superb | SUP / 极美品 | Perfect centering, flawless gum, crisp perforations, brilliant color.
图案完美居中，原始背胶完好无瑕，齿孔完整，色彩鲜艳。 | | Very Fine | VF / 上品 | Slightly off-center, full original gum, no major defects.
图案微偏，原胶完整无修补，无明显缺陷，市场标准交易品相。 | | Fine | F / 中品 | Noticeably off-center, small gum disturbance or light hinge mark.
图案明显偏斜，背胶轻微贴痕或微黄，无撕裂。 | | Average / Poor | AVG/P / 下品 | Design touches edge, short perfs, heavy creases, or staining.
图案贴边，短齿、重褶痕或明显污渍，价值大幅打折。 | | 4 Key Components of Value / 影响邮票价值的四大要素 1. Mint Gum Condition / 邮票背胶状态 • MNH (Mint Never Hinged / 全新原胶未贴): Highest value, untouched original gum.
• MH (Mint Hinged / 贴胶/有贴痕): Stamp has hinge mark on the back.
• RG (Re-gummed / 人工刷胶): Fake gum applied to conceal damage, lower value. • MNH (全新原胶未贴): 价值最高，背胶保持出厂原始状态。
• MH (全新有贴痕): 背面留有贴片痕迹。
• RG (后刷胶): 为掩盖缺陷而人工补胶，价值显著低于原胶。 | 2. Centering & Margins / 图案居中度与边幅 A stamp where the design is perfectly centered within all four white borders commands a premium of 20% to 100% over off-center copies. 图案在四条白边正中央（均等白边）的“正居中”邮票，溢价可达普通品相的 20% 至 100%。 | 3. Cancellation Quality (Used Stamps) / 盖销邮戳品质（信销票） Light, clear, and dated postmarks (Light Cancel) are highly sought after. Heavy, oily, or blacked-out cancels diminish facial beauty and market price. 信销票以邮戳清晰、图案覆盖少（轻戳/圆腰戳）为上。黑重浓油墨戳会严重破坏画面美感，降低收藏价值。 | 4. Paper Soundness / 纸张完好度 The paper must be free of thinning, tears, pinholes, foxing (yellow spots), or iron rust spots. Thinning on the back reduces value drastically. 纸张须无揭薄、裂口、针孔、黄斑或锈斑。背面揭薄（Thin）会使邮票价值大幅受损。 | | |