Published July 20, 2026
What hairline, fritting, and restoration actually mean in an auction condition report for Chinese porcelain and paintings — and what to ask before you bid.
"Minor fritting to the rim, light surface wear, otherwise in good condition." Nineteen words, and they can move a lot's realistic value by half. The condition report is the one document every serious bidder requests before an Asian art sale, and it is written in a compressed professional dialect that understates by convention — a dialect most first-time bidders have never been taught to read.
This guide decodes that language for Chinese porcelain and paintings: what the standard terms actually describe, which flaws are original to the making and which are damage, what "restoration" covers, and how to use a report — and its silences — before you raise a paddle.
What a condition report is, and what it is not
A condition report is a written opinion on the physical state of a lot, prepared by the auction house's specialist department and supplied free on request to any prospective bidder. For higher-value lots it often comes with additional photographs — the base, the rim, the interior, raking-light shots — beyond what the catalog shows.
What it is not is a guarantee. Auction houses sell nearly everything "as is," and their conditions of sale say plainly that condition reports are statements of opinion, not warranties. If the report misses a hairline, that is generally your problem, not theirs. This is not cynicism; it is the structure of the market, and it explains the golden rule of auction buying: the report is the beginning of your due diligence, not the end of it. The same logic applies to attribution language, which has its own coded ladder — covered in our first-time bidder's playbook.
The porcelain vocabulary
The core terms, roughly in ascending order of severity:
| Term | What it describes | How much it matters ||---|---|---|| Surface wear / scratches | Fine abrasion to the glaze from use and handling | Expected on genuinely old pieces; heavy wear on display-only forms is odd || Fritting | Tiny flakes lost from vulnerable edges — rims, footrims, raised decoration | Common and usually minor; "extensive fritting" is a different conversation || Chip | A discrete loss larger than a frit, often to rim or foot | Value-relevant; ask for a photo with scale || Hairline | A fine, tight crack, often only visible against light | Serious on fine porcelain — cracks travel; length and location are everything || Star crack | Radiating crack, usually in the base from an impact | Significant structural damage || Crack | A full open crack | Major damage; priced accordingly || Restoration / repair | Any later intervention — filling, overpainting, regilding, reglued breaks | The most elastic word in the report; always ask what, where, and how much |
Two habits will serve you well. First, ask about location: a hairline hidden in a footrim is a different object from one running through the central medallion. Second, ask about extent in plain numbers — "restoration to the neck" can mean a retouched frit or a replaced neck, and the specialist will usually tell you which if you ask directly.
Firing flaws are not damage
Chinese porcelain carries marks of its own making, and a good report distinguishes them from injury. Kiln grit adhering to an unglazed footrim, small iron spots where impurities burned through the glaze, glaze pooling and thin patches, firing cracks in thick bases that happened in the kiln, spur marks where supports touched the glaze — all of these are original features. On earlier wares they are part of the texture of authenticity; connoisseurs of Ge-type crackle glazes have even built an entire aesthetic on what began as a firing behavior.
The distinction matters at the bidding level: "firing line to base" and "hairline to base" read almost identically but describe different objects. A firing line was there the day the piece left the kiln and is stable; a hairline is damage with a history and a future. If the report's wording leaves you unsure which is meant, ask the department to clarify in writing.
Paintings and works on paper
Condition language for Chinese paintings runs on a different vocabulary, because the vulnerabilities are different — paper, silk, and mounting rather than glaze and body:
Foxing — scattered brown spots from mold or impurities in the paper. Common, treatable by conservators, but disfiguring when heavy.
Toning — overall darkening of paper or silk with age. Silk in particular darkens to brown; some toning is expected on anything old.
Creasing — horizontal creases from rolling and unrolling are the occupational disease of the scroll format; deep creases can crack pigment and fiber.
Losses / wormholes — missing paper or silk, insect damage, often filled and retouched during remounting.
Remounting — the painting has been transferred to a new mount at some point. Nearly all old Chinese paintings have been remounted, sometimes several times; a skilled remount preserves, a crude one destroys. Our guide to Chinese painting mounting explains why this matters so much to value.
Retouching / infill painting — later hands strengthening or replacing lost passages. The key question is where: retouching in blank background is routine; retouching in faces, inscriptions, or seals goes to the heart of the work.
For paintings, insist on high-resolution images in normal and raking light, and ask specifically whether inscriptions and seals show any strengthening.
Restoration and the ultraviolet lamp
Modern restoration on porcelain can be close to invisible in daylight: fills airbrushed and blended, cracks overpainted well past their edges, replaced sections color-matched. The standard first screen is ultraviolet light, under which many overpaints and adhesives fluoresce differently from the original glaze. Specialists examine lots under UV as a matter of routine, and you can ask whether they have and what it showed.
UV is a screen, not a verdict — some modern materials are formulated to read quietly under the lamp, and honest old surfaces can fluoresce confusingly. For a significant purchase, the sequence is: read the report, ask the specialist your specific questions, view the lot in person if at all possible, and handle it. Weight, balance, and the feel of the glaze under a fingertip carry information no report transmits. The same in-person session is when you check the things reports do not cover at all — quality of painting, honesty of the mark, and whether the object's story hangs together as a whole.
Using the report before you bid
Practical sequence for any lot you are serious about:
Request the condition report early — departments get slammed in the final days before a sale.
Read the catalog description and the report together; the catalog says what the lot is, the report says what shape it is in, and discrepancies between them are questions to ask.
Ask your specific follow-ups in writing: location and length of any hairline, extent of restoration, UV findings.
View in person or send a representative for anything expensive.
Price the condition in. Damage discounts on Chinese porcelain are steep — a hairline can take away much of a fine piece's value, while honest wear on a rare piece may barely matter. The rarer the object, the more forgiving the market; the more common, the more perfection is the standard.
Keep the report. After purchase it becomes part of the object's file, alongside invoices and provenance documents.
Common questions
Are condition reports free?
Yes, at essentially all major houses — they are part of pre-sale client service, requested through the lot page or the specialist department. Additional photographs are also normally free. What costs money is skipping them: bidding on Chinese porcelain without a report is gambling on the least forgiving variable in the market.
What does "please note this lot is sold as is" mean for me?
It means the risk of condition sits with you once the hammer falls. Auction houses disclaim warranties on condition in their terms of sale, and post-sale claims over condition issues that a report or viewing could have caught rarely succeed. The practical answer is process: report, questions, viewing, then a bid that reflects what you learned.
Is a restored piece worth buying?
Often, yes — at the right price. Professional restoration on a rare or beautiful object is a legitimate part of the market, and openly disclosed restoration prices itself in. The pieces to avoid are those where restoration is extensive, undisclosed, or concealing structural damage, and price is pretending otherwise. What you should never do is discover restoration after the sale that a direct question would have surfaced before it.
Do condition reports cover authenticity?
No. Condition and attribution are separate opinions — the report describes physical state, while the catalog's attribution language carries the house's view of what the object is. Reading that language, and the layered way experts actually authenticate Chinese works, is its own skill and belongs to a different stage of your due diligence.
Further reading
How to Photograph a Porcelain Mark for Authentication — when you request extra photos, this is what a readable shot needs.
Provenance for Chinese Art — the other half of pre-purchase due diligence.
How to Care for Chinese Porcelain — keeping the condition you just paid for.
Reading the Foot Rim — what the unglazed base tells you when you finally handle the piece.
Browse our porcelain collection
Modern hand-painted porcelain in the Jingdezhen tradition — condition stated plainly, no decoder ring required.
Explore Further







