---
title: "How to Identify Antique Chinese Porcelain: Age Signs"
url: https://realrareantiques.com/antique-porcelain-age-signs/
language: en
description: "How to identify antique Chinese porcelain step by step: shape, base, glaze, colour, painting, marks and wear, and what each sign of age can tell you."
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  zh-Hans: https://realrareantiques.com/zh-hans/antique-porcelain-age-signs/
---

Guide

# How to Identify Antique Chinese Porcelain: Age Signs and Dating

Knowing how to identify antique Chinese porcelain is less a matter of any single test than of method: look at every part of a piece in a set order and ask whether each part points to the same period. Centuries of use, storage and handling leave marks that are hard to fake convincingly, and the kiln leaves marks of its own. This guide sets out the method, explains the main signs of age and what they can and cannot tell you, and leads to our detailed guide on each.

## What to look for

1. Look for wear where a piece was actually touched and used: the foot rim, the base, the rim and raised decoration.
2. Check that scratches run in random directions and vary in depth, not in neat parallel lines.
3. In early blue and white, look for dark iron spots sunk into the cobalt, not painted on top of the glaze.
4. Follow crackle and glaze lines with a lens: natural ones are irregular and discoloured unevenly.
5. Make sure the colours and style match the period the piece claims, including any reign mark.
6. Judge all the signs together; no single one proves age.

## How to identify antique Chinese porcelain: the method

Specialists examine a piece in much the same order every time. Each step asks one question, and the answers should agree with one another.

1. **Shape and potting.** Is the profile right for the period: the swell of the shoulder, the height of the neck, the cut of the foot? Does the piece feel the right weight for its size and type? Our guide to [Chinese porcelain shapes](https://realrareantiques.com/chinese-porcelain-shapes/) shows how forms changed.
2. **Body and base.** Turn the piece over. The foot ring, the exposed clay and the way the base was trimmed, glazed and supported in the kiln are often the most honest evidence a piece offers.
3. **Glaze.** Look at its colour, thickness, gloss and bubbles, where it pools and where it stops. Each period and kiln had its own glaze.
4. **Colour.** Check the tone of the underglaze blue and any enamels. Some colours did not exist before a certain date, and the blue itself changed from reign to reign.
5. **Painting.** Compare the drawing, the brushwork and the borders with pieces of secure date. A copy often reproduces the motifs correctly but paints them with a different hand.
6. **Mark.** Read any mark, then ask whether it agrees with everything above. A mark records what was written on a piece, not when it was made.
7. **Wear and signs of age.** Finally, look for the wear, staining and firing marks described below, and check that they are where they should be.

A piece that passes every step is not thereby proven, but a piece that clearly fails one needs a good explanation. For the periods and wares themselves, start with our guide to [antique Chinese porcelain](https://realrareantiques.com/antique-chinese-porcelain/).

## What age signs are, and their limits

Age signs fall into two groups. Some come from the kiln and are fixed at the moment of firing: iron spots, glaze contractions, firing cracks and the character of the body and glaze. Others build up over the years: wear, scratches, staining and the darkening of crackle.

Both matter, but neither proves age on its own. Forgers know what collectors look for and imitate it, and a genuine piece may have spent centuries wrapped in a cupboard with almost no wear at all. What counts is whether every feature of a piece, from its shape and painting to its base and its wear, tells the same story.

The close-ups below show four of these signs.

*Foot rim: an unglazed foot ring and base, where the bare body fired to an orange tint in the kiln.*

*Wear: fine scratches crossing the underglaze blue in different directions, beside dark iron spots.*

*Iron spots: dark brown patches sunk into the underglaze blue, where iron in the cobalt concentrated in firing.*

*Crackle: fine lines in the glaze at the rim of a jar, stained a yellowish brown.*

## Shape, body and base

Antique Chinese porcelain was thrown on the wheel or shaped over and in moulds by hand, then trimmed with a blade when leather-hard. That leaves small irregularities: a foot ring not quite round, walls that vary in thickness, throwing ridges and joins inside a jar. Much modern porcelain is slip-cast in plaster moulds, which gives a uniform finish and often the wrong weight. Proportions matter as much as finish, because a copy may get the painting right and the neck, shoulder or foot slightly wrong.

The base shows the body itself wherever the glaze stops. On Yuan and Ming porcelain from Jingdezhen, the bare body often fired to an orange or reddish tint that fades softly into the clay, while the bodies of the eighteenth-century Qing wares are usually finer and whiter. Kiln grit, the marks of the trimming blade and the glaze inside the foot all changed with period and kiln. Our guide to [reading the base](https://realrareantiques.com/chinese-porcelain-foot-rings-and-bases/) shows what to look for, period by period.

The same method applies to Chinese pottery and stoneware, but the evidence is different. Earthenware, such as Han and Tang tomb pottery, was fired at lower temperatures and stays porous. Stoneware, such as Cizhou ware and many celadons, is dense but not white or translucent. Their bodies, glazes and firing marks have to be judged against their own kilns, not against Jingdezhen porcelain. Our guides concentrate on porcelain and the high-fired wares of the Song, Yuan, Ming and Qing.

## Wear on the glaze surface

*Fine scratches and brown flecks in the glaze just inside the rim of a vessel.*

Old porcelain that has been used or handled usually shows fine scratches and a softening of the glaze's shine, especially on the foot rim, the base and the inside of bowls and dishes. The scratches cross each other at random and vary in depth, because they were made by many different objects over a long time.

Pieces that spent a long time in the ground or the sea can lose much more. Their glaze may be dull, pitted or partly eroded, and the decoration underneath can look faded.

Artificial wear tends to be too even. Scratches made with abrasive paper run in parallel lines, and acid used to dull a new glaze leaves the whole surface uniformly matt, including places that would never have been touched. Our guide to [signs of wear](https://realrareantiques.com/signs-of-wear/) goes into more detail.

## Crackle and glaze lines

Crackle is a network of fine lines in the glaze. It forms because glaze and body shrink by different amounts as a piece cools, and it can appear in the kiln or develop years later. On some wares it was deliberate: Song potters valued it on Guan and Ge wares, and it was widely imitated later.

Over time, dirt and grease work into the lines and stain them, often a yellowish brown. On an old piece the staining is uneven: darker where the piece was handled, lighter elsewhere, and sometimes confined to one area. Forgers stain crackle with tea, ink or dyes, which tends to colour every line to the same depth.

A single glaze line or crack, as opposed to an overall crackle, is usually damage rather than decoration. See our guides to [crackles](https://realrareantiques.com/crackles/) and to [hairlines, glaze lines and cracks](https://realrareantiques.com/hairlines-glazelines-and-cracks/).

## Iron spots and firing marks

*Dark, rust-coloured iron spots within the underglaze blue of a painted wave pattern.*

The cobalt used for Yuan and early fifteenth-century blue and white was rich in iron. Where the painter laid it on thickly, the iron concentrated during firing into dark, almost black spots, sometimes with a metallic sheen, sunk into the glaze. Later potters imitated the effect by dotting the colour on deliberately, and modern copies often paint the spots on or make them too regular.

These spots form in the kiln. They do not grow or appear with age, and the old idea that they come from moving a piece between climates is wrong. Small brown specks can also come from iron impurities in the clay or glaze.

Other firing marks are equally useful. Glaze contractions, where the glaze has pulled back to leave a bare patch, happen when dust, grease or uneven glazing stops the glaze from bonding. They are common on provincial Ming wares and much rarer on carefully made imperial pieces. Our [rust spots](https://realrareantiques.com/rust-spots/) and [glaze contractions](https://realrareantiques.com/glaze-contractions/) guides show more examples.

## Colours, painting and marks

*A blue and white dish painted with birds among flowering plants inside a lattice border.*

Colours and styles belong to their periods. Underglaze blue and underglaze red were in use by the Yuan; overglaze enamels became common in the Ming; and the opaque pink enamels of the *famille rose* palette appear only in the early eighteenth century. A piece with a Ming mark decorated in *famille rose* is therefore later than it claims. Our guide to the [presence or absence of certain colours](https://realrareantiques.com/presence-or-absence-of-certain-colors/) covers this in more detail.

The blue itself is one of the best guides to date. The imported cobalt of the Yuan and early fifteenth century, the soft blue of Chenghua, the purplish blue of Jiajing and the pure, layered blue of Kangxi are each distinctive, and our guide to [cobalt blue through the periods](https://realrareantiques.com/cobalt-blue-chinese-porcelain/) sets out the differences.

Painting style, shapes and borders changed from reign to reign as well, and a copy often mixes features from different periods. Reign marks were copied freely from the Ming onwards, so a mark must agree with everything else about the piece; we describe a piece as "with a Xuande mark", for example, rather than calling it Xuande. Our guide to [Chinese porcelain marks](https://realrareantiques.com/chinese-porcelain-marks/) explains how to read them, and [apocryphal marks](https://realrareantiques.com/apocryphal-marks/) explains why earlier reign marks appear on later porcelain. Japanese and Vietnamese potters also painted in Chinese styles, sometimes with Chinese marks: see [Chinese, Japanese or Vietnamese?](https://realrareantiques.com/chinese-japanese-or-vietnamese-porcelain/)

## Examining a piece yourself

*The interior neck of a blue and white jar, showing concentric throwing ridges.*

Work in good, even light with a 10x lens. Start with the base and foot rim, which show the body, the potting and the most honest wear. Look inside: the interior of a jar or vase often shows throwing ridges and joins that copyists do not bother to reproduce.

Then compare each feature with pieces of secure date, in museums or reference books. Check condition at the same time, since restoration can make a damaged piece look better than it is: our guide to [condition and restoration](https://realrareantiques.com/porcelain-condition-and-restoration/) explains what to look for. Our guide to [detecting fakes](https://realrareantiques.com/identifying-fakes/) explains the most common tricks.

## Where to go next

Each step and sign above has a guide of its own.

- [Reading the base](https://realrareantiques.com/chinese-porcelain-foot-rings-and-bases/), on foot rings, exposed body, kiln grit and the glaze inside the foot.
- [The blue in blue and white](https://realrareantiques.com/cobalt-blue-chinese-porcelain/), on how cobalt changed from the Yuan to the Qing.
- [Condition and restoration](https://realrareantiques.com/porcelain-condition-and-restoration/), on what to check before you buy.
- [Chinese, Japanese or Vietnamese?](https://realrareantiques.com/chinese-japanese-or-vietnamese-porcelain/), on telling Asian blue and white apart.
- [Signs of wear](https://realrareantiques.com/signs-of-wear/), on natural and artificial wear.
- [Crackles and crazing](https://realrareantiques.com/crackles/), on deliberate and accidental crackle and how it stains.
- [Hairlines, glaze lines and cracks](https://realrareantiques.com/hairlines-glazelines-and-cracks/), on telling damage from firing flaws.
- [Rust spots](https://realrareantiques.com/rust-spots/), on iron spots in the cobalt and the body.
- [Glaze contractions](https://realrareantiques.com/glaze-contractions/), on bare patches where the glaze pulled back.
- [Kiln firing faults](https://realrareantiques.com/kiln-firing-faults/), on the accidents of the kiln.
- [Discolouration and glaze deterioration](https://realrareantiques.com/discoloration-and-glaze-deterioration/), on burial, the sea and staining.
- [Presence or absence of certain colours](https://realrareantiques.com/presence-or-absence-of-certain-colors/), on which colours each period could make.
- [Detecting fakes](https://realrareantiques.com/identifying-fakes/), on the most common deceptions.

**Collecting Chinese porcelain?** The collection covers porcelain of the Song to Qing dynasties. Ask for the price or more photographs of any piece; we reply personally within two business days.

[Browse the collection](https://realrareantiques.com/shop/)

Last updated October 2026

## Further reading

- [GuideAntique Chinese Porcelain: A Collector's Guide to Periods, Wares and MarksA collector's guide to antique Chinese porcelain from the Song to the Qing: how it was made, the periods and wares, reading marks, judging age and value.](https://realrareantiques.com/antique-chinese-porcelain/)
- [ArticleIs It a Real Ming Vase? How Collectors TellHow to tell if a Ming vase is real: the shape, the unglazed base, the blue, the mark, signs of age, and the copies you are most likely to meet.](https://realrareantiques.com/ming-dynasty-porcelain-vases-and-cermaics/)
- [GuideApocryphal Marks: Why Ming Reign Marks Appear on Later PorcelainWhat an apocryphal mark on Chinese porcelain means, why Xuande and Chenghua marks appear on later pieces, and how to date and value a piece that carries one.](https://realrareantiques.com/apocryphal-marks/)
- [GuideBuying Antique Chinese Porcelain: A Collector's GuideHow to buy antique Chinese porcelain with confidence: where genuine pieces come from, what a good listing shows, and the questions to ask any seller.](https://realrareantiques.com/buying-antique-chinese-porcelain/)

The porcelain that followed: [Song dynasty ceramics](https://realrareantiques.com/song-dynasty-ceramics/) and [Song pieces in our collection](https://realrareantiques.com/product-category/antique-chinese-porcelain/song-dynasty-porcelain/).