tencel lyocell

What is tencel lyocell?

TENCEL Lyocell starts as wood. The wood pulp gets dissolved into a thick goo, then squeezed back out into thread. What makes it special is the liquid used to dissolve it. It is non-toxic, and the factory runs a closed-loop system, which just means it captures over 99 percent of that liquid and reuses it instead of dumping it. So it skips the smelly, harsh chemical called carbon disulfide that older fabrics like viscose rely on.

How tencel lyocell is made

TENCEL Lyocell starts as wood pulp, usually eucalyptus, beech, or spruce from managed, certified forests. That pulp is the same starting point every wood-based fiber shares.

The split from viscose happens at the dissolving step. Viscose breaks its pulp down with carbon disulfide; lyocell dissolves it directly in NMMO (N-methylmorpholine N-oxide), an amine-oxide solvent with no known toxicity to the people handling it. The solution is pushed through fine holes and spun into fiber in one pass.

Lenzing's mills recapture up to 99.7 percent of that NMMO and feed it straight back in, and the small amount that leaves in wastewater breaks down in biological treatment. That recovery loop is what earns TENCEL Lyocell its closed-loop name and keeps the process close to waste-free.

The fiber comes out smooth and absorbent, carrying almost none of the harsh leftover chemistry plain viscose can. Any risk with TENCEL Lyocell arrives later, at dyeing and finishing.

Not all tencel lyocell is the same

TENCEL is a brand, not the name of the chemistry. Generic or private-label lyocell uses the same basic solvent route, but only the TENCEL label guarantees the audited 99-percent-plus recovery rate and certified wood sourcing behind it.

Is tencel lyocell safe to wear?

This is about as clean as a man-made fiber gets against your skin. The NMMO solvent is captured rather than vented, and the finished thread is washed until it carries almost no processing chemistry. It absorbs moisture and moves dampness off your skin, so the surface stays drier and bacteria have less to feed on, which helps if you run hot or irritate easily.

The risk with a TENCEL Lyocell garment comes from what manufacturers add afterward: dyes, and wrinkle-proof or shrink-proof coatings that can leave behind formaldehyde, a skin irritant. Read the finished piece, not the fiber name.

• Wicks moisture fast Pulls dampness off your skin and releases it quickly, so you stay drier than you would in cotton or polyester.
• Smooth on sensitive skin The rounded fiber surface causes far less rubbing and irritation than coarser fibers.
• Holds less odor A drier surface gives bacteria less moisture to grow in, so it stays fresher between washes.
• Certified compostable Undyed TENCEL Lyocell is certified to biodegrade in soil, fresh water, and marine settings, so it reverts to nature rather than shedding plastic.

OEKO-TEX Standard 100Forest Stewardship CouncilCanopyStyle

Doing this check on every product page yourself is the tedious part. The Toxome Chrome extension reads the composition for you while you shop, so you see whether something is tencel lyocell (and what else is in it) before you buy, not after it arrives.

How tencel lyocell affects the planet

Lyocell's advantage is the closed loop. The solvent that dissolves the wood pulp is non-toxic, and the factory recaptures over 99 percent of it along with the process water, instead of discharging it the way open-loop viscose does.

The absolute water and carbon numbers come mostly from Lenzing and industry data, so treat them as directional. The clearer claim is the relative one: the process recovers what it uses, and the fiber biodegrades.

Environmental figures are separate from the health score above, which reflects wearer health only. Numbers are per kilogram of finished fiber and rounded; see sources.

How to care for tencel lyocell

Tencel Lyocell, answered