Question
What is the difference between elemental chlorine free (ECF) and totally chlorine free (TCF)?
Answer
Paper is usually bright white because the pulp has been bleached, and traditional chlorine bleaching is harmful to the environment. ECF and TCF describe two cleaner approaches to that whitening step.
| Method | What it means |
|---|---|
| ECF (Elemental Chlorine Free) | Bleached without elemental chlorine gas, using chlorine dioxide instead, which sharply cuts harmful byproducts |
| TCF (Totally Chlorine Free) | Bleached without any chlorine compounds at all, typically using oxygen, ozone, or hydrogen peroxide |
- Both are cleaner than conventional chlorine bleaching
- TCF eliminates chlorine entirely and is often paired with recycled or virgin-fiber eco stocks
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