GLOSSARY

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K

keys

In painting frames, small, wedge-shaped sections of wood which are inserted in the corners of stretchers and enable the dimensions of the stretcher to be increased when they are tapped in. Also called chocs, wedges. See also Stretcher.

kilolux hour

The unit used to indicate exposure to light over a period of time. It is determined by the number of hours of exposure multiplied by the intensity of the light-measured in lux-divided by 1,000. Different types of objects can withstand different exposures of kilolux hours, with the most sensitive requiring low levels-no greater than 200 kilolux hours in a year.

As an example, an historic costume on permanent display in a museum which is open 5 days a week for 5 hours a day all year round (52 weeks), and which receives light to an intensity of 200 lux while the museum is open, would be exposed in a year to higher levels of kilolux hours than the recommended guidelines:

5 x 5 x 52 x 200 lux hours = 260,000 lux hours or 260 kilolux hours.