Tips & Advice

The problems arise if the conditions suddely change

Antiques and the environment

15 February, 2009

Even if your treasured objects appear to be in good order their condition should be regularly monitored, as should the environment in which they are kept. As human beings, we are constantly reviewing the effects of weather extremes, increased pollution levels, and everyday maintenance on our bodies.

While antiques are inanimate object, they too suffer from the effects of heat, light, pollution, irresponsible use and abuse. It is the responsiblility of the owner of today to make sure his or her antiques endure for future generations to enjoy, use, and learn from.

Organic materials are formed of once living matter such as wood, bone, shell, leather, natural textiles, wax, paper. All are sensitive to environmental conditions.

They expand and contract with fluctuations in:
- Temperature: shrink and swell
- Humidity: warping, cracking and shrinkage
- Light: fading and even break down of material

The problems arise if the conditions suddely change. This is likely to happen in the winter, especially when the temperature drops below 0, the heating goes up and the dry cold air results in a sharpe drop in the Relative Humidity level (RH).

An acceptable RH level is considered to be 50-60%. Most organic materials react slowly to moderate change: but a 20% fluctuation may result in damage such as cracking or warping.

IMPORTANT:
Monitor the RH level with a digital or analogue indicator and maintain with a humidifier (or dehumidifier). Even if the RH level is correct, a heat source such as a radiator or powerful lighting may dehydrate an item placed nearby.