家具断代，最可靠的不是看外观，而是看榫卯。因为外观可以仿，榫卯结构很难完全复刻。这篇按四种常见榫卯讲清断代逻辑。
一、四种常见榫卯
不同时代、不同部位用不同榫卯。榫卯的精细程度、复杂程度，反映的是工艺水平和时代风格。
燕尾榫
形似燕尾，越拉越紧，是家具最牢固的榫卯之一。明式家具的燕尾榫做得精细、暗藏；清式更粗壮、外露。看精细度可辨早晚。
格肩榫
用于桌面、椅面的边框连接。明式格肩榫做得规整、紧密；清式更粗大、宽厚。看接缝是否紧密可辨早晚。
粽角榫
三根方材在角上相交，形似粽子角。明式常用，做工精细；清式也常用，但更重装饰。看三面是否等分可辨早晚。
走马销
可拆卸的榫卯结构，常见于组合家具。清式和民国常用，明式少见。看是否有走马销可辨早晚。
二、榫卯对比表
| 榫卯 | 常见时代 | 特征 | 断代线索 |
|---|---|---|---|
| 燕尾榫 | 明、清、民国 | 越拉越紧 | 明精细、清粗壮 |
| 格肩榫 | 明、清 | 边框连接 | 明紧密、清宽厚 |
| 粽角榫 | 明、清 | 三面交角 | 明等分、清重装饰 |
| 走马销 | 清、民国 | 可拆卸 | 明少见、清民常用 |
三、上手怎么看？
- 看接缝：榫卯接缝是否紧密、有无缝隙
- 看做工：榫卯是精细还是粗糙，是明式还是清式风格
- 看用料：榫卯用料是否一致，有无后配
- 看结构：是否存在拆装痕迹、走马销痕迹
四、常见误区
- 误区一：榫卯对就是老——榫卯可以后做
- 误区二：明式榫卯一定比清式精——具体看工艺
- 误区三：走马销就是清——民国也常用
- 误区四：只看榫卯就能断代——要结合用材、包浆
下一步可以做什么？
- 去本地古董家具店看实物，重点看榫卯接缝
- 找一件可拆卸的家具，亲手体验榫卯结构
- 把每次看到的不同榫卯拍下来，做自己的对比库
For dating furniture, the most reliable clue isn't appearance — it's joinery. Appearance can be faked; joinery is very hard to fully replicate. Here are four common joints.
1. Four common joints
Different eras and parts use different joints. The refinement and complexity of joinery reflect craft level and period style.
Dovetail joint
Shaped like a dovetail — pulls tighter under stress. Ming dovetails are fine and concealed; Qing are thicker and exposed. Refinement tells the period.
Shouldered joint
Used for table tops and chair frames. Ming joints are neat and tight; Qing are thicker and broader. Seam tightness tells the period.
Corner joint
Three square members meet at a corner, shaped like a rice-dumpling corner. Ming pieces are neat; Qing pieces more decorative. Equal division tells the period.
Sliding joint
A detachable joint, common in modular furniture. Qing and Republic pieces use it; Ming rarely. Presence of sliding joints tells the period.
2. Comparison
| Joint | Period | Feature | Clue |
|---|---|---|---|
| Dovetail | Ming, Qing, Republic | Tightens under stress | Ming fine, Qing thick |
| Shouldered | Ming, Qing | Frame connection | Ming tight, Qing broad |
| Corner | Ming, Qing | Three-way corner | Ming equal, Qing decorative |
| Sliding | Qing, Republic | Detachable | Rare in Ming, common later |
3. How to look
- Seams: tight or gapped?
- Craft: fine or rough? Ming or Qing style?
- Materials: consistent or replaced?
- Structure: signs of disassembly or sliding joints?
4. Common misconceptions
- Correct joint = old — joints can be redone
- Ming joinery always finer — depends on the piece
- Sliding joint = Qing — Republic also common
- Joinery alone dates it — combine with wood and patina