16 C.F.R. § 1610.3 Requirements.
Title 16 - Commercial Practices
(a)(1) Normal flammability, Class 1. This class shall include textiles which meet the minimum requirements set forth in paragraph (a)(1)(i) or paragraph (a)(1)(ii) of this section. Textiles meeting these requirements are generally accepted by the trade as having no unusual burning characteristics. (i) Textile without nap, pile, tufting, flock, or other type of raised-fiber surface. Such textiles in their original state and/or after being dry-cleaned and washed as described in §§1610.4(d) and 1610.4(e), when tested as described in §1610.4 shall be classified as Class 1, normal flammability, when the time of flame spread is 4 secondsd d On August 23, 1954, the Flammable Fabrics Act was amended, changing the test for the time of flame spread for plain-surfaced fabrics, provided in paragraphs 3.1.1.1 (now §1610.3(a)(1)(i)) and 3.1.3.1 (now §1610.3(a)(3)(i)), by reducing the burning time from 4 to 3 (ii) Napped, pile, tufted, flocked, or other textiles having a raised-fiber surface. Such textiles in their original state and/or after being dry-cleaned and washed as described in §§1610.4(d) and 1610.4(e), when tested as described in §1610.4, shall be classified as Class 1, normal flammability, when the time of flame spread is more than 7 seconds, or when they burn with a rapid surface flash (from 0 to 7 seconds), provided the intensity of the flame is so low as not to ignite or fuse the base fabric. (2) Intermediate flammability, Class 2. This class shall include textiles which meet the minimum requirements set forth in paragraph (a)(2)(i) of this section. Textiles meeting these requirements are recognized by the trade as having flammability characteristics between normal and rapid and intense burning. (i) Napped, pile, tufted, flocked, or other textiles having a raised-fiber surface. Such textiles in their original state and/or after being dry-cleaned and washed as described in §§1610.4(d) and 1610.4(e), when tested as described in §1610.4, shall be classified as Class 2, intermediate flammability, when the time of flame spread is from 4 to 7 seconds, both inclusive, and the base fabric ignites or fuses. (3) Rapid and intense burning, Class 3. This class shall include textiles which have burning characteristics as described in paragraphs (a)(3)(i) and (a)(3)(ii) of this section. Such textiles are considered dangerously flammable and recognized by the trade as being unsuitable for clothing because of their rapid and intense burning. (i) Textiles free from nap, pile, tufting, flock, or other type of raised-fiber surface. Such textiles in their original state and/or after being dry-cleaned and washed as described in §§1610.4(d) and 1610.4(e), when tested as described in §1610.4, shall be classified as Class 3, rapid and intense burning, when the time of flame spread is less than 4 seconds.e e See footnote d. (ii) Napped, pile, tufted, flocked, or other textiles having a raised-fiber surface. Such textiles in their original state and/or after being dry-cleaned and washed as described in §§1610.4(d) and 1610.4(e) when tested as described in §1610.4 shall be classified as Class 3, rapid and intense burning, when the time of flame spread is less than 4 seconds and when the intensity of flame is such as to ignite or fuse the base fabric.
Title 16: Commercial Practices
PART 1610—STANDARD FOR THE FLAMMABILITY OF CLOTHING TEXTILES
Subpart A—The Standard
§ 1610.3 Requirements.
