How to Care for Chinese Porcelain: A Practical Collector's Guide

A Chinese porcelain piece — a Qianlong vase, a Kangxi blue-and-white plate, a Ming celadon bowl — sits on the collector's shelf with a kind of quiet authority. It has survived two or three centuries already, and it expects to survive the collector's stewardship as well. The care practices that protect that survival are mostly straightforward, mostly disciplined rather than expensive, and mostly grounded in respecting what porcelain is and what it is not. This article is the practical care guide for collectors who have brought home their first significant piece, or who have inherited a small collection and want to look after it without compromising either the works themselves or their appraisal value.

What porcelain actually is, in care terms

Chinese porcelain is a high-fired ceramic body made principally from kaolin and petuntse, vitrified at temperatures between 1280°C and 1350°C in a reducing atmosphere. The fired body is dense, vitreous, and chemically inert under ordinary household conditions — porcelain does not absorb water, does not react with normal cleaning agents, and is not vulnerable to many of the climate concerns that affect paper, silk, wood, or metal works in the same collection.

What porcelain is vulnerable to is mechanical. The vitrified body is hard but brittle, and an impact that a wooden bowl would absorb fractures a porcelain bowl. Old restorations — gluing, in-painting, gold riveting — introduce stress points that read in raking light long after the repair is invisible to a casual glance. Glazes can develop crazing, the fine network of surface cracks that opens over decades and lets in dirt and moisture. Marks and underglaze decoration are below the glaze and are nearly permanent; overglaze enamels sit above the glaze and can be abraded by improper cleaning.

The care discipline follows directly: protect against impact, support during handling, clean conservatively, and pay attention to old repairs and to glaze condition.

Handling: the two-hand rule and the surface beneath

Every piece of porcelain is handled with two hands. The fingers of the dominant hand support the foot rim or the base; the fingers of the other hand support the rim or the body's narrowest point. The piece is not lifted by a single handle, by the rim alone, by the spout of a teapot, or by any decorative element that was not built to bear weight. Handles on Chinese porcelain are typically applied attachments, not engineered load points, and they fail more often than the body proper.

The surface a piece is set down on matters as much as the lifting technique. A clean, padded surface — felt-lined tray, sheet of acid-free tissue over a wood table, an unfolded cotton towel — protects the foot rim from grit-loaded contact that grinds against the unglazed base. The hardest contact in routine handling is the moment the foot rim meets the shelf, and the cumulative wear from that moment is what makes some pieces' foot rims read as polished smooth in old collections. The foot-rim dating framework covers what a healthy foot rim should look like and what wear patterns to read for.

Photographing a piece for documentation or insurance purposes belongs in this discipline as well. The photography guide for porcelain marks covers the camera, lighting, and surface setup that captures the underside without subjecting the piece to flipping risk.

Cleaning: dust, fingerprints, and what to leave alone

Routine cleaning of porcelain is dust removal, not washing. A soft sable brush, the kind used for makeup or watercolour, removes accumulated dust from glazed surfaces without scratching the glaze. Brushing is done with the piece supported on a padded surface, in one direction, with the strokes light enough that the brush hairs bend at their tips rather than at their roots.

Fingerprints on glazed surfaces are removed with a barely damp microfibre cloth, used in small light strokes, with the piece supported by the other hand. Distilled water is the cleaning fluid; tap water can leave mineral residue on dark glazes. Detergents, ammonia-based glass cleaners, and the various proprietary "antique cleaners" sold for furniture or silver are inappropriate for porcelain and can interact with old gilding, overglaze enamel, or repaired sections.

Pieces with crazing — the fine glaze cracks visible under raking light — should not be wet-cleaned because moisture wicks into the cracks and carries dirt deeper into the glaze structure than a brush can reach. A crazed piece is dust-brushed only, and the visible dirt in the crazing is accepted as part of the piece's age, not removed.

Overglaze enamel decoration — the famille rose and famille verte enamels that sit on top of the glaze — abrades under any vigorous cleaning. Pieces with significant overglaze enamel are brush-cleaned at most, and any wet contact is reserved for unmarked glazed surfaces well clear of the enamel zones.

Display: shelving, lighting, and earthquake reality

Display practices for porcelain divide between the routine concerns — light, dust, traffic patterns — and the catastrophic concerns, primarily impact from seismic motion or accidental contact. Both matter, on different time horizons.

Routine display benefits from a stable shelf at a height that does not invite handling by guests or children, a back-stop that prevents a piece from being knocked forward, and ambient lighting that flatters the piece without baking it. Porcelain colour is much less light-sensitive than paper, silk, or pigment-painted works, so the lighting constraint is closer to aesthetic than to conservation. A 250-400 lux ambient with a directional spot for viewing reads well and does no harm.

Earthquake concerns are real for collectors in seismic regions and worth budgeting for proportionally to the collection's significance. Museum putty (a removable adhesive wax used to anchor objects to shelves), shelf retaining bars or guards, and shelf placement away from high-foot-traffic walls are simple interventions. Display cases with secured glass doors are a meaningful step up from open shelving, and shelves at lower heights survive seismic motion better than tall shelves whose contents tip from the top.

Group-display practices matter too. Pieces displayed close enough to touch each other will eventually touch each other under some combination of vibration, settling and accidental contact, and rim-on-rim contact between two porcelain pieces is the most common source of avoidable chips in a collector's catalogue. The discipline is to leave a clear inch or two of clearance between displayed pieces.

Climate: stability rather than specifics

Porcelain itself is not climate-sensitive in the manner of paper, textile, or wood, but the materials that surround it in a collection often are. Display cases with humidity-buffered interiors are valuable not for the porcelain but for the wooden stands, silk display cloths, ivory inlay or boxwood furnishings that often accompany the pieces. Stability matters more than exact specifications: a steady 50% relative humidity across the year is meaningfully easier on the surrounding materials than a humidity that cycles from 30% in winter to 70% in summer, even if the average matches.

Direct sunlight should be avoided not because the porcelain itself fades — most porcelain glazes are quite light-stable — but because the heating effect of direct sun on a closed display case can drive condensation cycles on the inside surfaces, and because adjacent materials in the case will fade and yellow under sustained exposure.

Old repairs: how to read them and what to do about them

Most porcelain that has reached the collector's shelf through a century or more of ownership carries some repair history. Common kinds:

Glue repairs. Older glue repairs — animal hide glue from the nineteenth century, shellac from the early twentieth, epoxy from the mid-twentieth onward — read under raking light as a thin line, slightly off-colour from the surrounding glaze. Some are stable; some have failed and the piece is held together only by the glaze tension at the joint.

Gold rivet repairs (juci). A traditional Chinese repair method using small staples or metal rivets drilled into the body to hold a crack. These are part of the piece's history and should not be removed; they are sometimes prized as evidence of long ownership.

In-painted restorations. Paint applied to disguise a chip or repair, sometimes very well executed and hard to spot without UV light. These are part of the piece's appearance but should be documented and disclosed in any sale or appraisal.

Filled chips. A chipped rim or foot filled with epoxy and in-painted to match the glaze. Stable but visible under raking light or magnification.

The care decision around old repairs is generally to leave them alone unless they are actively failing. A failing glue joint that has begun to separate visibly may warrant professional conservation; a stable century-old repair is part of the piece's identity. Modern intervention by an inexperienced hand often does more damage than the original repair ever did.

Storage between display rotations

Collectors who rotate pieces between display and storage — common for larger collections — benefit from storage practices that mirror the display discipline. Pieces are stored in acid-free tissue, in cardboard or wooden boxes, on shelves that are stable in temperature and humidity. Each piece is wrapped separately; nothing in storage is in direct contact with another piece. Tissue is replaced if it becomes discoloured.

Pieces with old repairs benefit from particular care in storage: the wrapping should not exert tension on the repaired area, and pieces with structural repairs should be stored in their natural display orientation rather than upside down or on their side. The zhuangbiao mounting tradition covers an analogous discipline for scroll storage; the underlying principle of "store in the orientation the piece was made to inhabit" applies across the collection.

Common questions

Can I run a Kangxi blue-and-white plate through the dishwasher?

No — and the question is more common than one might expect when display pieces are inherited and used as decorative tableware. Dishwashers subject porcelain to thermal shock, detergent that abrades glaze, and impact risk against other items in the load. Antique porcelain is hand-washed in lukewarm distilled water with minimal soap, or simply dust-brushed if no actual food contact has occurred.

Is it safe to use antique porcelain as functional dinnerware on occasion?

Some collectors do, on the principle that the pieces were made to be used. The conservation argument is that even careful use accelerates wear at the foot rim, introduces thermal cycling stress, and exposes the piece to chip risk. The decision is the collector's; the documented practice is to use lesser pieces for occasional service and to display the significant pieces.

How do I know if a glaze crack is structural or just decorative crazing?

Crazing is a network of fine surface cracks that follow the glaze's stress pattern — typically very fine, often forming a grid or irregular polygons across the surface, and present from shortly after firing rather than developing later. Structural cracks are coarser, follow the form's stress lines (across a base, down a body), and are often associated with a impact moment rather than with gradual aging. Crazing is read as a condition feature; structural cracks are read as damage.

What about the wooden stand that came with the piece?

The wooden stand is part of the piece's presentation and benefits from a light wax polish (museum-grade microcrystalline wax) every few years to prevent the wood from drying. The stand should not be stored on top of the piece, and the piece should not rest on the stand under tension — the stand carries the piece's weight and should fit it without forcing.

Where do I find a qualified porcelain conservator for an actual problem?

Major museum conservation departments often maintain referral lists for specialist conservators in their region. Auction houses also retain conservators for catalogue-condition work and can refer privately. The discipline is to engage a conservator with documented Chinese porcelain experience specifically rather than a general ceramics conservator; the materials and intervention norms differ enough that specialist training matters.

Further reading

The chinese porcelain marks guide is the master reference for reading the underside of a piece and confirming its claimed period.

The foot-rim dating framework covers what a healthy foot rim looks like and what wear patterns reveal about handling history.

The photography guide for porcelain marks covers documentation practice that supports both insurance and future appraisal needs.

Chinese porcelain care rewards the collector who treats the works as long-term stewardship rather than as static display pieces. The practices above — two-hand handling, conservative cleaning, stable climate, attention to repairs, and considered storage — compound across decades. The pieces that the next generation receives in good condition are the pieces that were respected in the daily small disciplines, not the pieces that received heroic one-time interventions.