Fluctuations in temperature and humidity can be highly
detrimental to organic materials as they promote mould growth on
artefacts such as prints and textiles.
Painted surfaces, glues and varnishes can also become soft and
sticky in high temperature and humidity.
High humidity can also accelerate corrosion and tarnishing of
metal surfaces, particularly in association with pollutants in the
- ventilate storage or display areas to reduce the potential for
- enclose metal artefacts in air-tight containers containing
desiccated (blue) silica gel.
- use desiccated silica gel to deal with persistent mould growth
on leather and other organic materials.
- avoid putting artefacts in environments with extreme
temperature and humidity fluctuations such as rooms with
air-conditioning that are switched on only intermittently.
- allow artefacts to adjust to new environmental conditions after
being moved. This can be achieved by surrounding the artefacts with
absorbent packaging materials that can buffer the environmental