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Notes

  1. Light reflectance value is the measure of how much light is reflected from a surface in comparison to how much light the surface received (in percent).
  2. A very dark surface absorbs light like a sponge and reflects only a small amount of the light

 

 

 

 

 

 

 

 

 

 

 


Gloss and Light Reflectance:

 


Gloss and light reflectance are unrelated surface characteristics of a finish. Gloss is the degree to which the finish reflects visual images. Light reflectance is the amount of light the surface reflects. Neither characteristic is related to hue, so it is possible to have a finish with low gloss and low light reflectance.

For example: black reflects no light yet, when black is used in a glossy enamel, it reflects clear visual images. On the other hand, when a flat, white paint is applied to a wall, it reflects much light but no images.

Since both gloss and light reflectance can be measured by instruments, these characteristics
can be assigned numerical values, that can be written into architectural specifications and paint applications.

Light reflectance value is the measure of how much light is reflected from a surface in comparison to how much light the surface received (in percent). A white surface can reflect almost all the light hitting it. A very dark surface absorbs light like a sponge and reflects only a small amount of the light. Pigments of light color will reflect more light than pigments that are dark. If available lighting is a concern, light colors should be used.

Light Reflectance Values of Various Colors:

special reflectance curvesWhite: 70 - 90%
Ivory and Cream 55 - 71%
Light Yellow 65 - 70%
Light Buff 40 - 56%
Light Green 40 - 50%
Medium Green 15 - 30%
Orange 15 - 30%
Medium Blue 15 - 20%
Dark Blue 5 - 10%
Medium gray 15 - 30%
Red and Maroon 3 - 18%
Medium and Dark Brown 3-18%
Black 1 - 4%