Black has a light reflectance value of 0 and absorbs all light.
Light reflectance value chart ral.
Reflectance is the proportion of light that a surface reflects compared to the amount of light that falls on the surface.
As an example the above chart shows the lrv of different shades of grey between white and black.
Light reflectance value lrv is a measure of visible and usable light that is reflected from a surface when illuminated by a light source.
The approximate light reflectance value lrv of a colour indicates the amount of visible light that a colour will reflect.
Light reflectance value lrv is the total quantity of visible and useable light reflected by a surface in all directions and at all wavelengths when illuminated by a light source.
Because the reflectance value is a proportion of the light reflected off the surface rather than the amount of light that falls on it typically the brightest whites have an lrv of 85 points and the darkest blacks have an lrv of 5 points.
An lrv is a value.
Lrv but a consistent light reflectance value is not obtainable from pearlescent or metallic colours the visual samples displayed on the screen are not binding because brightness and contrast may vary from screen to screen and neither are the colours on a printout from a printer.
Ral colour code light reflectance value ral colour code light reflectance value 000 15 00 5 31 010 50 40 20 85 000 20 00 6 18 010 50 45 20 31 000 25 00 7 88 010 50 50 20 82 000 30 00 9 32 010 60 10 30 45 000 35 00 11 47.
In the past products have been tested to an american standard as per the attached and it should be remembered that other factors can affect the lrv such as gloss or incidence of light.
The surfaces are consequently very dark and can get very hot.
Can perceive light and dark and therefore lrvs are a suitable method to measure contrast.
The table below shows the average lrv values measured for a range of.
British standard bs 8300 2001 a1 2005.
Method of test to determine the lrv light reflectance value of different surfaces of materials.
