Square Circle Forum

I just found a great article on how to do a burn test to identify the fibre composition of your yarn.

How To Do the Burn Test

Synthetic Yarns (Acrylic, Nylon)

  • Smells like burnt plastic
  • Flame does not extinguish for a long time, continuing along until blown on or submerged in water. Warning: don’t pinch the burned end; the melted synthetic material might cling to the skin.
  • Yarn seems to be “eaten up” or melted by flame
  • Does not leave ashes
  • Burned ends turn black and harden

Plant-Based Yarns (Cotton, Linen, Rayon)

  • Smells like burnt linen
  • Flame continues to burn until blown on or submerged in water, much like candle niches
  • Flame is easy to extinguish
  • Fine ash, much like ashes from burnt paper, is left behind

Animal-Based Yarns (Wool, Silk, Alpaca, Angora)

  • Smells like burnt hair
  • Flame almost immediately dies down on its own
  • Leaves charred, crisp ashes

Enjoy! :o)

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That should help a lot of people.  If I don't know the fiber content I always do the burn test.

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