1. Standard- BS6853 Annex D
BS6853 Annex D: Methods for measuring smoke density
BS6853:1999 Code of practice for fire precautions in the design and construction of passenger carrying trains.

BS 6853 Annex D.8.3 is utilized for Minor Use Materials (Tables 7 and 8 of BS 6853: 1999) and Textiles (Table 11 of BS 6853: 1999).

2. Standard Brief-BS6853 Annex D

The smoke density measurement taken from a material under fire conditions gives an indication of the visibility through the smoke, this is important as reduced visibility in a real fire situation makes it more difficult to escape from a fire hence increasing the threat to human life from the toxic gases, flames and heat.

BS6853 Annex D.8.3—smoke density test using small scale test method

3. BS6853:1999 Standard requirement for Smoke density testing
Interior minor use materials of mass 31g to 500g for BS6853 (BS6853 table 7) requirement: A0(max)≤0.017.
Exterior minor use materials of mass 400g to 2000g for BS6853 (BS6853 table 7) requirement: A0(max)≤0.029.…

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