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COLOR CALL
A list compiled from the lighting plan of all the colors needed for the rig
and their size. This term also applies to the act of preparing color filters
and frames from such a listing.
COLOR CHANGER
- Scrollerwhere a long string of up to 16 colors is passed horizontally in front of a lantern. Remotely controlled by the lighting desk. Some scrollers have cooling fans to prolong the life of the gel string. Stronger colors will burn out faster without coolingor if the focus of the beam is concentrated on the gel. If colors aren't lasting very long in scrollers try changing the focus of the lantern. HEAT SHIELD clear gel should be used between the lens and the color scroller to absorb some of the heat.
- WheelElectrically or manually operated disc which is fitted to the front of a lantern with several apertures holding different color filters which can be selected to enable color changes. Can also be selected to run continuously.
- Semaphorewhere framed colors are electrically lowered into place in front of the lantern. Remotely controllable. Can perform additive color mixing by lowering two colors into position at the same time.
- MagazineManual semaphore-type device used on the front of a followspot. Known in the USA as a BOOMERANG.
COLOR CORRECTION
The use of color filters to compensate for the different color temperatures
of different light sources. Important in lighting for TV and film.
COLOR FILTER
- A sheet of plastic usually composed of a colored resin sandwiched between two clear pieces. The colored filter absorbs all the colors of light except the color of the filter itselfwhich it allows through. For this reason denser colors get very hotand can burn out very quickly. There are a number of manufacturers of Color Filters - Lee (UK)Rosco (US) and Gam (Great American Market - US) are the most popular. Each manufacturer's range has a numbering system for the different colors. It's important to specify which range you're talking about when quoting numbers.
A color filter is sometimes known as a Gelafter the animal material Gelatinefrom which filters were originally made.
- Color media placed in front of or within a lighting fixture to alter the color of the light produced. Filters for conventional fixtures are often made of a dyed polyester film. Since dyed filters work by absorbing unwanted colors and passing desired colorsthey deteriorate from heat and must be replaced when they "burn up". Automated fixtures use more permanent dichroic color filters which are created by vacuum depositing thin films onto heat resistant glass.
- The predominant method of producing colored light is the use of color filters with a 'white' light source. The white source contains all of the colors of the spectrum; the filter absorbs the unwanted parts of the spectrum and transmits the wavelengths that make up the desired color.
- A product used to change the color of projected light.
COLOR FRAME (or Gel Frame)
A frame which holds the color filter in the guides at the front of a lantern. Many different sizes of frames are needed for the different lanterns.
COLOR MIXING
Combining the effects of two or more lighting gels:
- AdditiveFocusing two differently colored beams of light onto the same area (eg Cyc Floods). Combining colors in this way adds the colors together eventually arriving at white. The three primary colors additively mix to form whiteas do the complementary colors.
- SubtractivePlacing two different gels in front of the same lantern. Subtractive mixing is used to obtain a color effect that is not available from stock or from manufacturers. Because the ranges of color are so wide the need for subtractive mixing is reducing. Combining colors in this way reduces the light towards blackness. The three primary colors mix subtractively to form black (or to block all the light).
COLOR SCROLLER
An accessory placed in front of a lighting fixture that can be used to remotely change colors
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