Vintage and antique picture frames

An antique frame is a piece of furniture that happens to be shaped like a border. Understanding how they were made explains almost everything about how to identify them, what they are worth, and how not to ruin them.

How old is old

The trade convention: antique means 100 years or more; vintage covers roughly 30 to 100 years. Retail uses both words to mean "styled to look old", so neither term tells you anything without evidence.

The evidence is on the back.

Reading the back of a frame

Almost every reliable indicator of age is invisible from the front.

Joints. Hand-cut mitres are rarely perfect and often show slight variation between corners. Nineteenth-century frames were commonly joined with glue and hand-driven nails, sometimes with a spline. V-nails and staples are twentieth-century, and machine-perfect corners suggest modern production.

Nails. Square-section cut nails were standard until roughly 1890. Round wire nails came in after. A frame with square nails is genuinely old; one with modern round wire brads is not, unless it has been repaired.

Wood movement. Old wood has shrunk across the grain over decades. This shows as slightly open mitres — the corner gaps a fraction — and as ridges where the grain has risen. Uniform, tight corners on an apparently old frame usually mean a reproduction.

Backing. Original backing boards are often thin wood, old cardboard or, on paintings, nothing at all. Original glazier's points are hand-cut and irregular.

Labels and inscriptions. Framer's labels, exhibition stickers, chalk inventory numbers and pencil notes are all common on old frames and are worth photographing before anything is disturbed. They frequently establish provenance.

Dust and grime patterns. Genuine age produces dirt that accumulates in recesses and is absent on raised, handled surfaces. Artificially aged frames often have wear applied evenly, or worse, wear in places that would never wear in use.

What frames were made of

Carved wood

The oldest and most valuable method. Ornament cut directly into the timber, usually a fine-grained hardwood, then gessoed and gilded. Carving shows tool marks and small asymmetries; each element differs slightly from its neighbour.

Composition ornament

From the late eighteenth century, ornament was increasingly made from compo — a putty of chalk, hide glue, rosin and linseed oil, pressed warm into carved wooden moulds and applied to a plain frame while pliable.

Compo made ornate framing affordable and it is what the overwhelming majority of nineteenth-century decorated frames are. It also has a characteristic failure mode: as the linseed oil oxidises over decades the compo becomes brittle and shrinks slightly, producing fine craquelure across the ornament and eventual chipping, usually at corners and high points.

Repeating elements that are identical to each other indicate compo. Repeating elements with visible individual variation indicate carving.

Gesso and bole

Under the gilding is gesso — chalk in animal glue, built up in many thin layers and sanded. Under the gold on water-gilded frames is a coloured clay bole, traditionally warm red. Where gilding has worn through on genuine period frames, that red shows, and it is one of the most reliable signals of authentic water gilding.

Valuing one, honestly

Value depends on period, region, maker, condition and above all whether the original finish survives.

The point that catches people: a period frame with worn, dirty, original gilding is worth substantially more than the same frame stripped and regilded. Regilding is the most common way an antique frame's value is destroyed, usually by someone trying to improve it.

We cannot value a frame from a description, and neither can anyone else — it needs physical examination by someone who handles them regularly. Auction houses will give an opinion on something they might sell. If you have a frame you suspect is significant, get it looked at before you touch the finish.

Cleaning and repair

Cleaning. A soft, dry, natural-bristle brush. Nothing else. Water dissolves the hide glue in gesso and lifts the bole and gold with it. Solvents strip finishes. Metal polish removes gilding entirely. This is not caution for its own sake — these are single-application, irreversible mistakes.

Small losses. Chips in compo can be filled with a modelling compound, sanded to profile, sealed, and toned with gilding wax. Done carefully, a small repair is invisible at normal viewing distance and costs almost nothing.

Larger losses in repeating ornament. Take a silicone mould from an intact section of the same run and cast a replacement. This is the standard conservation technique and is well within reach of a patient amateur on a decorative frame.

Structural failure. Open corners on an old frame are usually the result of wood movement rather than glue failure, and clamping them shut can crack the gesso across the corner. This is a case for a conservator on anything valuable.

What not to do: strip it, sand the finish, repaint it, or apply modern varnish. All four are irreversible and all four reduce value.

Putting modern artwork in an old frame

This works beautifully and needs adaptation, because old frames were built for a different job.

Rabbet depth. Frames made for oil on canvas often have a shallow rabbet, since a stretched canvas sits proud rather than inside. For glazed paper artwork you need depth for glazing, mat, artwork and backing — about a quarter to half an inch. Deepening a rabbet is possible but should be done reversibly and never on anything genuinely valuable.

Squareness. Old frames are rarely square. Measure the rabbet at both ends of each side and use the smallest figures, and have glazing cut to the measured size rather than to the nominal one.

Glazing. Original glass, where it survives, is often thin, wavy and slightly green, and it is worth keeping for its appearance if it is intact. If you need new glazing, acrylic is lighter, which matters because old frames are heavy and their joints are old.

Isolation. Do not let modern artwork touch old wood, old backing or old gesso. Use a fresh acid-free backing board and archival mounting so the artwork sits in a modern, inert environment inside an old frame.

Buying

Estate sales and auctions are where genuine frames appear at sensible prices, frequently attached to paintings nobody wants.

Architectural salvage yards accumulate frames alongside doors and fittings and often price them as decoration rather than as antiques.

Specialist frame dealers carry the good material and price accordingly. They will also tell you what you are looking at, which is worth the premium if you are learning.

Antique shops mark up heavily and rarely know framing specifically.

When buying, check the corners for movement, press gently on the ornament to find loose compo, look at the back for the indicators above, and be openly sceptical of uniform, crisp ornament described as period. A gold frame that looks flawless usually is — recently.