Light Reflectance Value Test Method

The lrv scale runs from 0 which is a perfectly absorbing black up to 100 which is a perfectly reflective white.

Light reflectance value test method. This publication is primarily centered on requirements used to assist the disabled including the visually impaired. This method requires an instrument employing diffuse illumination and 0 viewing geometry. Light reflectance value testing in 2013 access to and use of buildings was published within the building regulations. This outlined a need for certain surfaces and features to contrast visually with their environment.

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. Bs 8493 specifies the method of test to determine the light reflectance value lrv of different surfaces of materials. Method of test category. 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.

In architecture light reflectance value lrv is a measure of visible and usable light that is reflected from a surface when illuminated by a light source. 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 2008 a1 2010 light reflectance value lrv of a surface. Lrv is the proportion of visible light reflected by a surface compared to the sensitivity to light of the human eye.

The measurement is most commonly used by design professionals such as architectural color consultants architects environmental graphic designers and interior designers. 1 2 the test method is suitable for use with most object color specimens. 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.