It is important to store oil painting and works on paper in clean, dry conditions, preferably somewhere dark and where the temperature is cool and fairly constant.
Paintings should be placed upright on blocks to keep them off the floor with acid-free board between each one.
The largest and heaviest should be at the back of the stack and picture hooks should be removed to prevent them damaging the next frame or canvas.
Cover the stack with a clean dustsheet but do not use plastic as this can cause mould.
Unframed works on paper, such as maps or prints, are best kept flat in acid-free boxes or folders with acid-free tissue between each work.