Vetusta Metallum Ancient Bronze Conservation Studio

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Knowledge library

Understand before deciding

Articles on restoration, conservation and the ancient bronze market. No workshop recipes — only what helps an owner make an informed decision.

Bronze disease: what it is, how to recognise it and why it cannot be ignored

Loose pale-green powder on the surface is not patina. It is an active destructive process that will not stop by itself.

Diagnosis Chlorides Patina

Types of patina on ancient bronze: original, artificial and destructive

Not every green surface indicates antiquity, and not every darkening is a problem. How to distinguish valuable patina from dangerous corrosion.

Patina Diagnosis Restoration decisions

Should this object be restored? An honest answer to the central question

Sometimes the best treatment is no treatment at all. How to judge when restoration adds value and when it removes it.

MARCHENKO METHOD — decision framework for archaeological bronze conservation

Restoration method

MARCHENKO METHOD™: how intervention decisions are made

Diagnosis, limits of intervention, two approaches to recovering form, and the principle of stopping at the right point.

MARCHENKO METHOD™ Documentation Market & auctions

What an auction house sees first: how restoration affects lot acceptance

Apollo, Christie's and Dorotheum each have their own expectations regarding condition. What should be prepared so a lot can be accepted and sold.

Auction Lot preparation Bronze disease

Chloride removal: why the process cannot be rushed

Vacuum-assisted chloride extraction is one of the most reliable ways to stop active corrosion — and one of the slowest. Here is why.

Chlorides Vacuum Restoration decisions

Hidden damage: what a photograph cannot reveal

Cracks beneath patina, old adhesive inside, unstable metal. Why a preliminary photographic assessment must remain provisional.

Diagnosis Risks Patina

Artificial patina: when it is justified and when it damages value

Not every restorer says so openly, but artificial patina can be a standard tool in pre-sale preparation. What matters is how and why it is used.

Patina Auction Market & auctions

Restoration as an investment: when €1,500 of work leads to £30,000 at auction

Real cases from practice — when investment in pre-sale preparation pays back many times over, and when it does not.

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Important note

These articles explain principles, not recipes

Specific chemical formulations, soldering temperatures and patina recipes are workshop know-how and are deliberately not published. The articles explain the logic behind decisions — enough for an owner to act as an informed client.

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