Before 1983, the vertical exhibition of the Tapestry put great strain on it, due to its own weight. This strain was one of the damaging factors. It caused deterioration, breaks and tears.

To avoid such strain, the ideal situation would be a flat exhibition or an inclined support, but a horizontal, therefore linear, presentation posed a problem for the aesthetical aspect and the perspective. The Tapestry was after all made to be viewed vertically.

Repeated exposure to flash photography slowly and irreversibly damages the molecular structure of the colours, leading to discoloration and yellowing.

Photography therefore contributes to the premature ageing of the textile.

It is much better to buy a postcard, thus preserving our heritage for future generations to enjoy!!

The Tapestry is lit for 360 days a year by lighting ramps of 50 lux, the maximum lighting recommended for a permanent exhibition.

The effects of light are cumulative and irreversible. They speed up the ageing phenomenon of the fibres and deteriorate the dyes. Overexposing an object changes the colours and weakens the fibres.

The Tapestry is preserved at a constant temperature of 18/20°C with a relative humidity of 50-55 %.

Too much humidity would cause the fibres to swell, leading to chemical and biological deterioration of the material. Humidity plus a high temperature encourages the development of mould.

A dry climate with no humidity would cause the fibres to dry out, and become fragile and brittle.

Fluctuations in ambient humidity and temperature would cause the textile to expand and contract, which would make it more fragile.

Prevention of biological aggression is ensured by climate control: relative humidity and temperature.

Insects

Animal fibres with protein like wool are prone to insect attacks. Larva of clothes moths and carpet beetles would cause huge damage by feeding off the wool fibres.

Mould and mildew

Natural cellulose fibres like linen are very sensitive to mould. Excessive humidity and temperature would encourage the formation of mildew.

The canvas must not be touched. If it must be moved for any reason, we avoid contact with the hands as the oils would contaminate and therefore damage the material.

It is essential to wear white cotton gloves when manipulating the textile, to avoid dirtying it. It is also recommended to handle the material carefully, and avoid jewellery or other accessories, which might tear or snag the material.

Dirt would be damaging to the textile, as it would speed up localised deterioration.