Viscose is a semi-synthetic fabric made from wood pulp. It starts as a natural material (cellulose from trees), but goes through heavy chemical processing to become a soft, silky fiber. This puts it in a unique category: not fully natural like cotton, and not fully synthetic like polyester. In the textile industry, it’s classified as a “regenerated cellulosic fiber,” meaning plant cellulose is dissolved and then reformed into new fibers.
What Viscose Is Made From
The raw ingredient in viscose is cellulose, the structural material found in plant cell walls. Most viscose comes from wood pulp harvested from trees like beech, pine, eucalyptus, and spruce. Bamboo pulp and even cotton linters can also serve as the starting material, though wood remains the most common source.
A life cycle assessment comparing viscose made from different raw materials found that bamboo-based production carries the lightest environmental footprint, followed by wood, with cotton pulp requiring the most resources. Regardless of the plant source, the goal is the same: extract cellulose and chemically rebuild it into a wearable fiber.
How Wood Becomes Fabric
Turning a tree into a silky textile takes several chemical stages. First, wood is chipped and broken down into cellulosic pulp. That pulp is soaked in caustic soda (sodium hydroxide), which swells the cellulose and makes it reactive. The treated pulp is then shredded, aged, and exposed to carbon disulfide, a key solvent that converts it into a thick, honey-colored solution called cellulose xanthate.
This solution is forced through tiny holes in a device called a spinneret, similar to a showerhead. As the liquid streams emerge into an acid bath, the cellulose regenerates into solid filaments. Those filaments are washed, dried, and spun into yarn. The process was first patented in 1892 by English chemists Charles Cross, Edward Bevan, and Clayton Beadle, and commercial production began in the early 1900s.
How Viscose Feels and Performs
Viscose drapes beautifully, feels cool against the skin, and has a slight sheen that can mimic silk. It absorbs moisture well, breathes easily, and takes dye readily, which is why it shows up in everything from flowy dresses to bed sheets. On a day-to-day basis, it feels more like a natural fiber than a synthetic one.
The trade-off is durability, especially around water. Viscose loses a significant amount of its breaking strength when wet. The fibers swell as they absorb moisture, which leads to stretching, wrinkling, and shrinkage. Untreated viscose fabric can shrink by roughly 9.5% in a standard wash cycle. It also wrinkles easily and has low dimensional stability, meaning it doesn’t hold its shape as reliably as cotton or linen. This is why many viscose garments are labeled “dry clean only” or “hand wash cold.”
How It Compares to Modal and Lyocell
Viscose, modal, and lyocell are all regenerated cellulose fibers, essentially cousins made from the same raw material but processed differently. The differences in processing give each one distinct properties.
- Viscose (standard rayon) uses the traditional carbon disulfide process described above. It’s the softest and most silk-like of the three, but also the weakest when wet and the most chemically intensive to produce.
- Modal follows the same basic viscose process but with additional steps and higher concentrations of certain chemicals. It’s typically made from beech trees. The result is a fiber with better wet strength, less shrinkage, and a softer hand feel that holds up longer through washing.
- Lyocell (often sold under the brand name Tencel) skips the carbon disulfide entirely. Instead, cellulose pulp is dissolved directly in a non-toxic organic solvent, and 99.8% of that solvent is recovered and reused. This makes lyocell the most environmentally friendly of the three, and it also produces a stronger fiber with better moisture management.
Environmental Concerns
Viscose’s environmental profile is complicated. On one hand, it comes from a renewable resource and biodegrades readily. Research from Scripps Oceanography found that wood-based cellulose fabrics fell apart within 30 days in seawater, while polyester fabrics remained largely intact after more than 200 days. So unlike synthetic textiles, viscose doesn’t persist as microplastic pollution.
On the other hand, the manufacturing process raises serious concerns. Carbon disulfide, the chemical at the heart of viscose production, is toxic. A history published in the American Journal of Public Health documented decades of neurological and cardiovascular disease among workers exposed to it, along with environmental damage to towns and waterways near production facilities. That chemical is still in wide use in viscose manufacturing today.
There’s also the question of where the wood comes from. When sourced from responsibly managed forests, the raw material is sustainable. When sourced from old-growth or endangered forests, it contributes to deforestation. Certifications like FSC (Forest Stewardship Council) on a viscose garment indicate the wood pulp was sourced more responsibly, but not all producers carry that certification.
Practical Care Tips
Because viscose is so vulnerable to water damage, how you wash it matters more than with most fabrics. Cold water and gentle cycles minimize shrinkage and fiber damage. Laying the garment flat to dry, rather than wringing it out or using a dryer, helps it keep its shape. If the care label says dry clean only, it’s worth following, particularly for structured pieces like blazers or tailored pants where shrinkage would be obvious.
Ironing viscose on a low setting while slightly damp can smooth out the wrinkles it’s prone to. Storing it on hangers rather than folded can also help, since the fabric creases easily under its own weight. With the right care, viscose garments stay soft and hold their color well over time.