Caring for bronze sculpture in your home is much easier than those in your garden. Indoor bronzes have an easy time of it compared to their large companions outdoors. They are sheltered from the urban air and ever-changing weather, but their environment still has an impact on them and if you want to keep your small bronzes as stable as possible then consider these ten tips.
1: Dust Regularly – Don’t be frightened to touch a bronze just because it’s an artwork. If you use a dry micro-fibre cloth or a soft brush, you’ll be doing a lot of good rather than harm. Removing dirt and grime prevents reactions between the pollutants in dust and the metal’s surface. We all hate more housework, but preventing corrosion is always better than curing it.
2: At least once a year, give the statue a thorough clean. Use white spirit to remove dirt and grime – I use a cotton rag to apply it. Then put a protective coating in place – this is one of the best ways of protecting a bronze’s surface. Outdoor pollutants from traffic do infiltrate buildings. Over time, they will corrode your bronzes (Grontoft et al, 2016). Rub on microcrystalline wax and burnish with a bristle brush or cotton rag as you might your shoes. It will improve the bronze’s lustre and retard surface change.
3: Internal materials like wooden floorboards and furniture emit acidic gases such as acetic or formic acid. These will damage your bronzes particularly if airflow is static and if the temperature of a room is likely to fluctuate widely. Consider where you locate your small bronzes. Try not to display them in sealed cabinets made from materials containing hard and soft woods or plywood (Gibson, 2010)
4: Avoid handling your bronzes. If possible, lift your bronzes with a clean cloth rather than touch them directly. Sweat from the hands is acidic and will corrode metal. Wax is only a thin barrier layer.
5: If you are storing a small bronze rather than displaying it. Ensure that the packaging materials are suitable. Do not wrap bronzes directly in bubble wrap or plastic. Houses tend to have poor humidity controls and though it might surprise you – bronzes do hold water. When they heat up that water will evaporate and if you’ve trapped it in plastic – you’ll get corrosion activity beneath the plastic.
6: If you accidentally spill red wine, tea, coke or even water on your bronze – then run for a cloth! Just because it’s not a textile that stains – don’t assume that the liquid won’t do any harm. If you whip it off quickly, then harm is averted. If you leave it to dry out, the metal is likely to etch in the perfect shape of the splash or spill. A little warm water on a clean cloth as dry as possible will enable you to remove the liquid and save your bronze surface. Don’t forget to dry your bronze after you’ve washed it though and replace the wax.
7: Admire your bronze often – don’t ignore it. If you keep an eye on your sculpture, you will notice if there is any change occurring. If rapid change occurs within a short period, then the chances are it is being exposed to something. Be mindful, and you could prevent a bigger conservation problem.
The owner of this bronze noticed the surface was pitting
8: Think about where you locate your bronze. If a statue is in a busy area of the house, it might get knocked, and scuffed. Bronze looks tough, but often small bronzes have delicate sculptural detail, and one bang can see sections break off or snap. Dents are very hard to remove successfully. Drafts also carry outdoor pollutants inside and humidity will peak and trough more which won’t do your bronzes any good.
9: If you want to give your bronze the Rolls Royce treatment then a high-spec display case made with materials that do not emit gases will go a long way. Though undoubtedly an expense, it has been shown that cases with robust seals prevent traffic pollution getting in, provides extra security if you are burgled, prevents household damage like spills and knocks. A low and stable relative humidity under 40% is ideal. It’s also wise to add some activated carbon to the base of the case to absorb any stray pollutants.
10: If you notice a greenish, powdery deposit on your bronze which is easily brushed away, but returns quickly – get it to a conservator ASAP! This deposit is a sign of active corrosion and needs quick, skilled treatment to prevent metal loss.
If you would like help or advice on your small bronze, do give Antique Bronze Ltd a call on 0208 340 0931 or take a look at our small bronze restoration page
Terje Grontoft, David Thickett, Paul Lankester, Stephen Hackney, Joyce H. Townsend, Kristin Ramsholt & Monica Garrido. “Assessment of Indoor Air Quality and the Risk of Damage to Cultural Heritage Objects using MEMORI dosimetry” Studies in Conservation 61:sup 1, 70-82. Routledge & IIC 2016 Link Here
Gibson, L.T. (2010) Acetic and formic acids emitted from wood samples and their effect on selected materials in museum environments. Corrosion Science, 52 (1). pp. 172-178. ISSN 0010-938X