The latest research by Reading University has provided the industry with additional detailed guidance in relation to LRVs - an issue that has caused uncertainty since revisions to Approved Document M to the Building Regulations for England and Wales were published in 2003. To aid the access of visually impaired people in the built environment, the revised Document M had provisions for contrast between ironmongery and door faces. The definition of 'contrast visually' was given as a difference in LRV (Light Reflectance Value) between the two surfaces of greater than 30 points. However, recent FAQs to BS 8300, published earlier this year by the ODPM, raised doubts that the specified minimum 30 point figure was appropriate. The FAQs state: "Whilst there is considerable confidence in recommending a difference in LRV of 30 points or more, there is also much anecdotal evidence to suggest that a difference of around 20 points may still be acceptable. Differences less than about 20 points may not give adequate contrast."
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