Light box or Viewing Booth | Texhour

The color viewing booth is a very important instrument that is used for matching of different products and materials for their colors with a standard reference. It is the best instrument for testing the specimen for a defect called metamerism.

Light box or Viewing Booth | Texhour
Light Box or Viewing Booth

 

LightBox or Viewing Booth

The color viewing booth is a very important instrument that is used for matching of different products and materials for their colors with a standard reference. It is the best instrument for testing the specimen for a defect called metamerism.

The metamerism is the phenomenon which causes the colors of products to appear different in different light sources. This can also affect the quality of the products as well as their appearance.

Viewing booths are surfaced in neutral gray colors and have various illuminant options.

Depending on the lighting and illumination conditions at the retail store, brands normally specify a Primary Light Source and a Secondary Light Source for color matching.

 

STANDARDIZED ILLUMINANT

DESCRIPTION

CCT (CORRELATED COLOR TEMPERATURE)

Inc A

Incandescent / Tungsten

2856

F11/TL84

TL84

4000

F2/CWF

Cool White Fluorescent

4230

D65

Noon Daylight

6504

UVA

Ultraviolet

The UV source is not to match colors, but to detect presence of optical whiteners.

 

Metamerism:

The phenomenon where two colors appear to match under one light source but not in the different light source. Simply it’s a change in the ‘H’ Hue due to the different light source.

• Common colors which show metamerism are: Khakis, Olives, Browns, Dark Oranges, Turquoises

• Even if a provided color standard is metameric, it is expected that the matching should be non-metameric!

• Multiple light sources permit metamerism testing.

• Ultraviolet is another light source in a light box. It can be used by itself or in combination with other light sources for the detection and evaluation of optical brighteners, whitening agents, or fluorescent dyes and pigments. These colors will “flare” (glow) in UV light.

 

metamerism