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LightControl .

LightControl

LightControl

LightControl is an indicator comprising a blue compound that exhibits a progressive and non-reversible colour change while exposed to light. It acts as an early warning system for lightsensitive objects. When the indicator colour turns from blue to purple, the yearly display allowance has been spent, meaning that the object has been exposed to the maximum amount of light recommended by art experts. If the indicator keeps its blue colour over a one-year period (or more), the lighting conditions comply with international museum recommendations and can be considered safe for the artefact. This does not mean that the object will not deteriorate at all from exposure to light; instead it indicates that the degradation from light will be gradual enough to not be noticeable for a century or more.




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