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Collapse What is DMF Contamination?What is DMF Contamination?
What problems do dark and medullated fibre contamination cause?
What happens if a top or fabric is contaminated with dark or medullated fibres?
In terms of dark and medullated fibre contamination, what is a sensitive end-use?
What is the relationship between the DMFR Ratings and the level of contamination in wool top?
How will the DMFR Scheme help buyers/topmakers make appropriate wool purchases?
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Expand Fibres from Other Animals?Fibres from Other Animals?
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Expand Relationship to the Dark and Medullated Fibre Test Relationship to the Dark and Medullated Fibre Test
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What is DMF Contamination? > What is the relationship between the DMFR Ratings and the level of contamination in wool top?

What is the relationship between the DMFR Ratings and the level of contamination in wool top?

The estimated dark fibre (df) or dark/medullated fibre (dmf) counts for DMFR Ratings are:

  1. Less than 50 df/kg
  2. 50-100 df/kg
  3. 100-200 df/kg
  4. 200-500 df/k
  5. Greater than 500 df/kg
  6. Contact with exotics resulting in high levels of both dark and medullated fibres.