Flammability Testing

Flammability Testing of Wearing Apparels

Flammability of Wearing Apparel – 16 CFR 1610 – (45 Degree Flammability)

The United States Federal Government requires clothing and textiles intended to be used for clothing to have Normal Flammability (Class 1) as tested with 16 CFR 1610 (ASTM D 1230 Standard Test Method for Flammability of Apparel Textiles). Fabric is mounted at a 45° angle from ignition source.

Some exemptions apply:

  • Certain Hats
  • Gloves
  • Footwear
  • Interlining fabric
  • Plain surface fabrics, regardless of fiber content, weighing 2.6 oz/yd2 or more (when using ASTM D 3776 to determine the fabric weight)
  • Fabric made entirely with these fibers, or blends of these fibers:
    • acrylic
    • nylon
    • polyester
    • modacrylic
    • olefin
    • wool



Vertical Flammability

Fabric is mounted vertically with ignition directly under fabric.

Test Methods performed:

  • ASTM D6413 – Standard Test Method for Flame Resistance of Textiles (Vertical Test)
  • NFPA 701 – Standard Methods of Fire Tests for Flame Propagation of Textiles and Films
  • Federal Test Method Standard No 191A Method 5903 – Flame Resistance of Cloth; Vertical