Viscose & Rayon: One Fiber, Two Names

How viscose is made

Wood pulp is treated, dissolved into a thick solution, and forced through spinnerets into fibers — natural cellulose in, smooth continuous fiber out. Because the raw material is plant cellulose but the transformation is chemical, viscose is classed as semi-synthetic: it wears like a natural fiber even though a factory made the filament.

Two variants are worth knowing. Bamboo viscose is the same process starting from bamboo pulp — the softness comes from the viscose process, not bamboo magic. EcoVero is Lenzing's certified viscose, made with lower emissions and traceable wood sources — a middle step between standard viscose and Tencel.

What viscose feels like

Fluid, cool and soft, with more weight and swing than cotton at the same thickness. It absorbs moisture readily, so it is comfortable in heat. The trade-off: viscose loses up to half its strength when wet, wrinkles more than synthetics, and can shrink if washed carelessly. It is a fiber that rewards slightly gentler habits.

What to sew with viscose

• Flowy dresses, wrap styles and full skirts
• Blouses and shirting with movement
• Viscose jersey for drapey tees and gathered styles
• Linings and prints where color saturation matters

Woven viscose shifts more than cotton under the machine — a fine needle, plenty of pins and a lighter presser-foot touch keep seams flat.

Types of viscose

• Standard viscose (rayon) — the everyday drapey woven; challis is its classic soft print cloth
• Viscose jersey — the fiber knitted: fluid, cool tees and dresses
• Bamboo viscose — the same process from bamboo pulp
• EcoVero — Lenzing's certified, lower-impact viscose
• Modal and lyocell — next-generation siblings with their own guides (modal, Tencel)

Viscose vs. polyester

Both are everywhere in fashion fabric, and they behave opposite ways. Viscose breathes and absorbs; polyester repels moisture but dries fast and never wrinkles. Viscose feels natural and cool; polyester is tougher and holds pleats. Prints on viscose look richer; prints on polyester survive more abuse. Many of the best drapey fabrics blend the two to split the difference.

Viscose and the environment

The fiber itself is plant cellulose and biodegrades; the question is the mill. Conventional viscose chemistry uses harsh solvents that demand careful handling, and standards vary widely by producer. Certified lines like EcoVero document lower emissions and traceable wood; lyocell goes further with a closed loop. Honest summary: viscose is not automatically green because it starts as a plant — the certificate, not the marketing, tells you how it was made.

How to care for viscose

Wash cool on gentle — or hand wash — and never wring it while wet, when the fiber is at its weakest. Reshape and hang or dry flat, then iron on medium with steam. Pre-wash before sewing: first-wash shrinkage of 3–5% is normal for untreated viscose.