Is Viscose (Rayon) Plastic-Free?
The honest chemistry, the performance trade-offs, and a straight verdict for founders deciding what their next line is actually made of.
Verdict: Plastic-free (with an asterisk)Viscose, also called rayon, is plastic-free with an asterisk. It is regenerated cellulose made from wood pulp, so the polymer is a plant cellulose rather than a petroleum plastic, and it biodegrades and sheds no microplastics. The asterisk is heavier than for lyocell: standard viscose uses an older carbon-disulfide process that is harsher on workers and the environment. Not a plastic, but not a clean natural fiber either.
What is Viscose (Rayon)?
Viscose is the original regenerated cellulose fiber and the most common form of rayon. Wood (or bamboo) pulp is chemically dissolved and re-formed into filament. Because the base polymer is cellulose, it is chemically plastic-free in the same family as cotton, but it is manufactured rather than grown into fiber.
- Fiber type
- Regenerated cellulose (semi-synthetic, plant)
- Source
- Wood pulp (often eucalyptus, beech, bamboo)
- Biodegradable
- Yes
- Sheds microplastics
- No (cellulosic, not plastic)
How is Viscose (Rayon) made?
Cellulose pulp is treated with caustic soda and carbon disulfide to form a soluble cellulose xanthate (the viscose solution), then extruded into an acid bath that regenerates the cellulose as fiber. The carbon-disulfide chemistry is the problem: it is toxic to workers and, in open-loop mills, to the surrounding environment. This is exactly the process lyocell was designed to replace.
How does Viscose (Rayon) perform?
Soft, drapey, breathable, and highly absorbent with a silky hand, which is why it is everywhere in dresses and linings. Its weaknesses: it loses significant strength when wet, wrinkles, shrinks, and is less durable than cotton or lyocell. It has no stretch on its own.
So, is Viscose (Rayon) plastic-free?
Plastic-free with an asterisk. The fiber is wood cellulose, not petroleum, so it is not plastic, it biodegrades, and it does not shed microplastics. But the asterisk is real: standard viscose is a manufactured fiber made with harsh carbon-disulfide chemistry. If you want the plastic-free cellulosic without the dirty process, choose lyocell (Tencel) or responsibly sourced modal instead.
Where you see it: Dresses, blouses, linings, and drapey fast-fashion wovens.
| Property | Viscose (Rayon) | Polyester | Organic cotton |
|---|---|---|---|
| Polymer origin | Wood pulp (plant cellulose) | Petroleum | Plant (cotton cellulose) |
| Is it plastic? | No* | Yes | No |
| Biodegradable | Yes | No | Yes |
| Sheds microplastics | No | Yes | No |
| Process note | Harsh carbon-disulfide process | Energy-intensive, petroleum feedstock | Water-intensive farming |
The OHZEHN-TEX™ take
Viscose is plastic-free at the fiber level, but the messy processing and weak wet strength are why we favor closed-loop lyocell for cellulosic needs. OHZEHN-TEX™ is our own bio-based performance fabric platform: bio-based nylon PA6.10 made from castor oil, with a bio-based stretch fibre made from sugarcane.
Does viscose (rayon) shed microplastics?
No. Viscose is regenerated cellulose, so what it sheds in the wash is a cellulosic microfiber, not a plastic one, and that distinction is measurable in the environment. The largest global survey of ocean microfibers to date (Suaria et al., Science Advances, 2020, based on 916 seawater samples across six ocean basins) found that only 8.2% of the fibers were synthetic; 79.5% were cellulosic and 12.3% were animal-derived. The persistent plastic microfiber problem is overwhelmingly a synthetic-fiber problem, and viscose sits on the cellulosic side of that line. DOI: 10.1126/sciadv.aay8493
The honest caveat, because we will not greenwash a fiber we do not even prefer: viscose is not a low-shedding fiber. In a controlled laundering study (Zambrano et al., Marine Pollution Bulletin, vol. 142, pp. 394 to 407, 2019), cotton and rayon knits actually released more microfibers per wash than polyester did. The difference is what happens next. Under aerobic aquatic conditions the cellulosic rayon and cotton fibers biodegraded, while the polyester fibers plateaued and did not degrade at all. So viscose sheds, but it sheds biodegradable cellulose rather than the persistent microplastic that a petroleum fiber leaves behind. DOI: 10.1016/j.marpolbul.2019.02.062
Where this fiber lands in production
If you are speccing this fiber into a line, these are the programs it touches most. Viscose (Rayon) shows up most in bralette and slip manufacturing, intimates and loungewear sourcing, and essentials manufacturing partner, and the standard that governs all of it is set out at production standard. The full definition of what counts is at plastic-free fabric.
Frequently asked questions
Is viscose the same as rayon?
Viscose is a type of rayon, and in everyday use the terms are used interchangeably. Rayon is the umbrella term for regenerated cellulose fibers; viscose is the specific, most common process. Lyocell and modal are other rayon types made with cleaner or stronger chemistry.
Is viscose plastic?
No, viscose is regenerated wood cellulose, not a petroleum plastic. It biodegrades and does not shed microplastics. It is plastic-free with an asterisk because it is a manufactured fiber made with harsh chemistry, not a raw natural fiber.
Is viscose more sustainable than lyocell?
Generally no. Both are cellulose and both are plastic-free, but lyocell (Tencel) uses a closed-loop, non-toxic solvent that recovers most of itself, while standard viscose uses open-loop carbon-disulfide chemistry. For a cleaner cellulosic, choose lyocell.