For areas where people with visual impairment may be present, Light Reflectance Values are important for ensuring noticeable differentiation between materials.
The LRV scale runs from 0, which is a perfectly absorbing black, up to 100, which is a perfectly reflective white. In reality, black is always greater than 0 and white never equals 100. As well as colour, the structure and texture of the product are also determining factors for LRV.
The current guidance in the relevant Code of Practice, BS 8300:2009 is that adequate visual contrast is provided if the Light Reflectance Values (LRV) of the contrasting areas differ by at least 30 points.
The current British Standard for the measurement of LRV is BS8493:2008+A1:2010.
We use Lucideon Limited for all of our Light Reflectance Value testing – you’ll find a link to them in our website footer below.