NFPA 272-1999 Standard Method of Test for Heat and Visible Smoke Release Rates for Upholstered Furniture Components or Composites and Mattresses Using an Oxygen Consumption Calorimeter.
4-2.7* Aluminum Foil. Aluminum foil that is 0.03 mm to 0.04 mm thick shall be used. 4-2.8 Basic preparation of specimens shall be as detailed in the following sections. 4-2.8.1 These basic instructions shall pertain to specimens that are comprised of only a single layer of fabric over a single layer of resilient padding. The same instructions shall apply to specimens where an interliner is laminated onto the back of the fabric. In the latter case, the fabric/interliner combination shall simply be treated as a fabric alone. For specimens that use multiple padding layers, separate interliner layers, and other more specialized constructions, supplemental instruc- tions are given in 4-2.11. 4-2.8.2* Cutting of Resilient Padding Blocks. Each resilient padding block shall be cut square, with 90-degree corners and face dimensions of 102.5 mm ± 0.5 mm × 102.5 mm ± 0.5 mm. The thickness of the resilient padding block shall be 50 mm, when a single layer of resilient padding is the only padding material used in the composite. 4-2.8.3* Forming Resilient Padding Blocks. Each batch of resilient padding specimens prepared shall be checked for mass. There shall be as a minimum three replicate tests per- formed for each specimen type. Therefore, once three blocks of resilient padding have been cut, the mass shall be deter- mined. No block shall have a mass of more than 105% of the mean of the three masses, nor a mass of less than 95%. If such a difference occurs, additional blocks shall be cut and the mass determined. The preparation of composites shall not start until three blocks of resilient padding that conform to the above 5% deviation limit have been obtained. The blocks accepted shall be marked, so as to be traceable. The mass of each block of resilient padding shall be recorded along with the identification marks of the blocks. The mass of resilient padding shall be reported in the test report along with other information about this test run.
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