Color in Light Flashcards
- Placing a transparency before a white light.
- Painted bulbs
How Color in Light is Obtained
Much of the wattage of a white bulb is absorbed in passing through a color agent.
- Selective Trasnmission and Absorption
Inefficiency of Color Filters
Transmit only a small percentage of the light and absorb the rest.
Vivid Hues- Selective transmission and absorption
Trasmit a greater percentage of the light.
Pale Tints (Unsaturated Colors)- Selective transmission and absorption.
- Is high in yellow
- Is favorable to most cosmetic colors
- When compared to flourescent light, the white bulb is better for highlighting:
- Fabric Textures
- Wood-grains on caskets
- Lamps with this light have a downward thrust lacking in fluorescent lamps.
Effect of Incandescent (White) Light on Cosmetics and the Environment.
- Give more illumination but lacks the downward “thrust” of incandescent bulbs.
- The color of some objects they illuminate appear dull and faded.
- Is high in green and blue and lacking in adequate red.
Effect of Fluorescent Light
- Hue
- Brightness
- Saturation
Measurements of Colored Light
The name of the chromatic color measurable in microns.
Hue
Dependent of the quantity of illumination passing through a color media.
Brightness (Brilliance)
- Fully saturated color
- Unsaturated color
Saturation
The hue is pure and vivid.
Fully Saturated Color
When 2 complementary hues are both directed toward the same surface the wave lengths mix to form white light.
Complementary Hues- Saturation
Results when there is an excess of one of the complements and very little of the other.
- Example: Pink- is a large amount of red with a small quantity of its complement.
Unsaturated Color
- Additive
- Subtractive
Methods of Mixing Colored Light
Wave lengths add together upon the surface.
- White light can be produced by the mixture of the three primary hues.
Additive
- Red, Green, Blue
- Correct mixture of these primary hues can form every other hue.
Primary Hues of The Additive Method
- Yellow, Blue-Green (cyan), Magenta
- Are made by projection of equal strengths of pairs of primary hues.
Secondary Hues- Additive Method
Secondary hues of the additive method are the _____ hues of the subtractive method.
Primary
Equal Mixtures of these in the additive method produce white.
Complements
Involves the diminution (subtraction) of the wave lengths of light.
- Reduction can gradually extend to a point where a complete black-out results.
Subtractive Method
Absence of any illumination.
Black-Out
One light source with two or more filters.
Application of The Subtractive Method
- Yellow
- Blue-Green (Cyan)
- Magenta
- These are the secondary hues of the additive method.
Primary Hues of the Subtractive Method
- Emphasis
- Absorption
- Conversion
Effect of Colored Lights on Colored Objects
The hue of an object appears more vivid when seen under the same hue of illumination.
Emphasis
When two values or intensities of the same hue are present (and the same hue in illumination strikes them) the larger area appears more vivid while the smaller, more “washed-out.”
Absorption
If the hue of an object and the illumination differ, the color of the object with either be converted into a different color or be obliterated.
Conversion
- Green + Blue Light = Cyan
- Red + Blue light = Magenta
- Green + Red light = Yellow
Additive Color System
Cyan + Magenta + Yellow = Black
Subtractive Color System
In the subtractive color system, this absorbs red light, reflects green and blue light.
Cyan
Absorbs green light, reflects red and blue light.
Magenta
Absorbs blue light, reflects red and green light.
Yellow
Absorbs green and blue light, reflects red light, appears red.
Magenta + Yellow
Absorbs red and blue light, reflects green light, appears green.
Cyan + Yellow
Absorbs red and green light, reflects blue light, appears blue.
Cyan + Magenta
