07/02/2021
Light
Probably the easiest environmental issue to understand and resolve for furniture is damage
from light. What we normally call "light" is really just a very narrow portion of the
phenomenon called "electromagnetic radiation" that corresponds to the sensitivity of our
eyes.
Simply put, light is a source of energy. Light interacts with everything it illuminates, and
light energy is directly translatable to damage to furniture surfaces. The amount of that
damage depends on the intensity and color. Bright light is more damaging than dim light,
blue light is more damaging than red light.
For the most part, light damage takes the form of discoloration, usually bleaching. Light
induces bleaching and degradation in most components of furniture: coatings, whether
transparent or polychrome; the wood itself; and especially upholstery textiles. Generally,
light damage is cumulative and permanent.
Responding to the potential for light damage is relatively simple and can also be
straightforward: when the furniture is not in use, it is best left in the dark. Even when
furniture is in use and in the light, damage can be reduced through common devices like
window shades, curtains, and screens for protection from direct sunlight or elevated light
levels. Ultraviolet filter films can be used to block the most damaging light frequencies if
there is concern over the color of the light, for example light from fluorescent bulbs or
ultraviolet radiation from sunlight. For extended periods of non-use, opaque dust covers are
recommended.
The most important thing to keep in mind is the relationship between light and damage to
furniture surfaces. As long as there is light, there will be light damage proportional to its
intensity and exposure time. But the application of simple measures can go a long way to
reducing damage. - JabF