Restoring sacred objects — the process step by step

Restoring sacred objects means returning liturgical vessels and furnishings to their original appearance and function without erasing their historic character. It most often concerns chalices, patens, ciboria, monstrances, reliquaries, altar crosses, candlesticks and tabernacles made of silver, brass or copper and covered with a layer of gold.

The issue is almost always the same: gold plating wears away where the object is handled daily, the silver beneath darkens from sulphides, and soldered joints at the base and knop crack. Add dents, loose stones in crowns and deformed threads. Regular conservation is far cheaper than rebuilding an object that has already been badly damaged.

Work begins with inspection and photographic documentation. We establish the metal, the thickness and condition of the plating, whether earlier repairs are present and whether the object is listed as a historic monument. That last point is decisive — listed objects require the consent of the regional heritage conservator and cooperation with an art conservator, and any intervention is kept to a minimum.

On that basis we prepare a quotation split into stages: mechanical repairs, cleaning, polishing, electroplating and, if needed, remaking missing parts. The parish receives one document and knows exactly what it is paying for.

The process follows a fixed order, because each stage prepares the surface for the next:

• Disassembly — the object is taken apart: cup, stem, base, decorative elements; stones and enamels are secured separately.
• Stripping old coatings — worn gold and chemical deposits are removed down to sound metal.
• Mechanical repairs — dents straightened, cracks soldered with silver solder, threads recut, stones re-set.
• Grinding and polishing — surfaces levelled, while engraved decoration and hallmarks are protected from being polished away.
• Electroplating — silver and gold plating at a controlled thickness.
• Inspection and assembly — coating measured, object reassembled, protected and packed for transport.

Experience matters most here: deciding what not to polish is often more important than the technique itself.

The inside of a chalice and the paten come into contact with the Eucharist, so liturgical law requires their surface to be gold or gold-plated. This is a requirement rather than a matter of taste — and the most common reason a parish asks for restoration.

Coating thickness determines whether the object lasts another few decades or returns to the workshop in two years. Thin decorative gilding wears off quickly; on liturgical vessels we apply markedly thicker coatings. Argentum runs its own electroplating services — gilding, silvering and rhodium plating — which lets us control bath parameters and thickness on each detail separately.

Old objects often lack individual parts: monstrance rays, ornament leaves, a stone setting, a ciborium hinge. If a symmetrical counterpart survives, we scan it, rebuild it as a 3D model and then produce a casting in the same metal, so the new part matches the original in both style and material.

On listed objects, new elements are recorded in the documentation so that a future conservator knows what is original and what was added. It is a standard worth keeping.

A typical chalice or ciborium restoration takes two to four weeks. Monstrances, reliquaries and stone-set objects need longer — usually six to eight weeks. It is worth allowing for the liturgical calendar and avoiding Advent and Lent, when demand peaks.

For a quotation we need photographs from several angles, dimensions, the metal if known, and whether the object is listed. Argentum has carried out restoration of sacred objects for five generations, all under one roof — repair, polishing and gilding — so the object never travels between subcontractors.