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What do the abbreviations NFR, DFR, FR, and IFR stand for?

April 26, 2017dfr fr IFR NFR stand

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What do the abbreviations NFR, DFR, FR, and IFR stand for?

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NFR: This fabric is not flame retardant. FR: The fabric has been treated with a flame retardant chemical. The warranted period of effectiveness is guaranteed for one year, but it is likely to be effective for much longer. The fabric has been tested and complies with NFPA 701 small scale. The flame retardant process will be removed by washing. NorthEast Stage recommends annual testing of this fabric using the NFPA 705 (1997 or later) Field Test Method for Textiles. DFR: The manufacturer has certified to NorthEast Stage that the fabric is durably flame resistant for the life of the fabric. The flame retardant process will not be removed by washing. NorthEast Stage, however, recommends annual testing of the fabric using the NFPA 705 (1997 or later) Field Test Method for Textiles, as accumulations of dust and oils may diminish the flame resistance of the fabric. IFR: The fabric has been manufactured using an inherently flame resistant fiber or durable flame retardant process. The fabric wi