Mould and Mildew Damage

There are two main conditions conducive to the growth of moulds and midlew. One is moisture and the other is stale air.

Dealing with mould and mildew

Exposure to strong sunlight for half an hour will kill most types of mould on textiles or leather. Strong sunlight can cause fading, but where mould is concerned, sunlight is the lesser of two evils. This process may not necessarily remove the mildew stains.
Removal and/or stain reduction of mildew can be done by a conservator, but it is very time consuming and expensive
Do not bleach items

Prevention is better than cure

Store items where they will not be exposed to high humidity. Not in sheds, roof spaces, or cellars
Do not leave textiles resting against surfaces that absorb moisture from the air e.g. brick or concrete
Do not keep items in a linen press or cupboard if it is situated in a laundry or anywhere near clothes drier
If items are musty, air them as soon as you can
Do not store textiles where humidity may get trapped in with the items e.g. in plastic bags
Do not seal the backs of frames on humid days, wait until the weather is dry
Check your frames from time to time to ensure moisture is not trapped in them
Do not use vacuum-sealed bags for heritage items. The lack of air makes the atmosphere very stuffy, and this is detrimental for the contents
Do not leave items in the bottom of the laundry hamper or ironing basket