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。 |
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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。
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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%。
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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。
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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。
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