Light Reflectance Value Test Method

Bs 8493 2008 a1 2010 light reflectance value lrv of a surface.

Light reflectance value test method.

Brightness is a commonly used industry term for the numerical value of the reflectance factor of a sample with respect to blue light of specific spectral and geometric characteristics. The lrv scale runs from 0 which is a perfectly absorbing black up to 100 which is a perfectly reflective white. This outlined a need for certain surfaces and features to contrast visually with their environment. Light reflectance value lrv testing for areas where people with visual impairment may be present light reflectance values are important for ensuring noticeable differentiation between materials.

Bs 8493 applies to. Method of test category. 1 2 the test method is suitable for use with most object color specimens. This method requires an instrument employing diffuse illumination and 0 viewing geometry.

Bs 8493 specifies the method of test to determine the light reflectance value lrv of different surfaces of materials. 1 1 this test method covers the measurement of light reflectance value lrv and visually small color difference between pieces of glazed or unglazed ceramic tile using any spectrophotometer that meets the requirements specified in the test method. The measurement is most commonly used by design professionals such as architectural color consultants architects environmental graphic designers and interior designers. In the absence of an australian or international standards organization iso test method cial determined that british standard bs 8493 2008 light reflectance value lrv of a surface method of testis the most appropriate standard for determining the spectral reflectance of carpets using a spectrophotometer.

Lrv is the proportion of visible light reflected by a surface compared to the sensitivity to light of the human eye. 1 1 this test method describes the instrumental measurement of the reflection properties and color of object color specimens by the use of a spectrophotometer or spectrocolorimeter with a hemispherical optical measuring system such as an integrating sphere. A method of light reflectance measurement by lun ke b sc computer science tsinghua university 1993 a thesis submitted in partial fulfillment of the requirements for the degree of master of.