How to Spot Fake Chinese Porcelain — 7 Signs Experts Check

Over 90% of Chinese porcelain bearing reign marks on the market does not date from the claimed period. This is not an estimate — it is the reality every serious collector and dealer faces daily.

After 30 years of handling Chinese porcelain every day — at fairs, in auction houses, during estate clearances — certain patterns keep returning. The same mistakes, the same copies, the same hopeful expectations colliding with the facts.

In this article I share the 7 signs I check first whenever someone presents me with a piece of Chinese porcelain. Not as a complete course in ceramic history, but as a practical checklist you can use today.

1. The Reign Mark — the First and Most Important Test

The reign mark on the base is what most people consider proof of authenticity. Ironically, it is the mark that misleads most often.

Reign marks were copied during the reign period itself — this is not a modern phenomenon. A Kangxi mark (1662–1722) may be authentic, but it could also be 19th-century, or from last week in Jingdezhen.

2. The Foot Ring — Where the Truth Hides

The underside of a piece of porcelain is the hardest part to fake. Turn the piece over and examine the foot ring: the unglazed rim where the piece rested on the kiln shelf.

On genuinely old porcelain you often see a soft, slightly uneven texture with mild iron oxidation (orange-brown specks). The biscuit feels dry and warm. On modern copies the foot ring is often too smooth, too white, or shows artificial ageing that does not hold up under close inspection.

3. Weight — Lighter Than You Expect

Authentic imperial porcelain from the finest periods (Kangxi, Yongzheng, Qianlong) was fired at extremely high temperatures with carefully selected clay. The result: relatively light for its size, with a clear ring when gently tapped.

Modern copies are often noticeably heavier. The clay composition differs, the firing temperature varies. This is a subtle but consistent difference that becomes easier to feel with experience.

4. The Glaze — Look With a Loupe

Authentic old glaze almost always contains microscopic air bubbles, irregularities, and sometimes crazing that has developed over centuries. This pattern is extraordinarily difficult to replicate.

Under UV light (blacklight) modern glaze fluoresces differently from old glaze. This is not an infallible test — restorations and later additions can obscure the picture — but it is a useful first indicator.

5. Decorative Style — Anachronisms Give It Away

Every period had specific decorative conventions. A dragon with five claws was reserved for imperial use. Certain floral motifs appear only in specific periods. The way figures are painted changes through the centuries.

A piece that claims to be Ming dynasty but features decorative elements that only became common in the Qing period has a problem — regardless of how convincing the mark looks.

6. Cobalt Blue — Not All Blue Is Equal

The famous blue-and-white porcelain owes its colour to cobalt oxide. But the source and purity of the cobalt differs by period and region.

Early Ming cobalt (imported from Persia) produces a deep, somewhat uneven blue with dark spots (“heaped and piled”). Later imperial cobalt is more uniform and brighter. Modern chemical cobalt has yet another character. The difference is subtle but recognisable to the trained eye.

7. Provenance — Where Does It Come From?

A piece with documented provenance — an old collection, an auction catalogue from the 1960s, a family photograph — is not automatically authentic, but it is a significant additional data point.

Be wary of stories without evidence. “It was always at grandma’s” is not provenance. An invoice from a reputable auction house dated 1978 is.

Summary: the 7 Checks at a Glance

• Reign mark — analyse writing style, colour and sharpness; a mark never proves authenticity
• Foot ring — texture, colour and oxidation of the unglazed area
• Weight — authentic imperial porcelain is often lighter than expected
• Glaze — microscopic structure and UV fluorescence
• Decorative style — check for anachronisms and period consistency
• Cobalt blue — colour character matches the claimed period
• Provenance — documented history as supporting evidence

Final Thought

No single test gives certainty. It is the combination of all these signs that makes a reliable judgement possible. That is precisely why AntiqBot uses multiple analysis vectors simultaneously — not one check, but an interplay of visual analysis, mark recognition and stylistic comparison.

And remember: doubt is not weakness. Doubt is the beginning of knowledge.