Finishing
Also searched as: finish, mechanical finishing, chemical finishing
Treatments after or around fabric formation that change appearance, feel or performance.
In detail
Finishing changes textile appearance, touch or performance beyond its basic construction and coloration. Processes may act mechanically or use chemical treatments. Despite the name, finishing is not always the final operation in a manufacturing sequence. Its effects should be evaluated on the actual finished textile.
The science and numbers
Finishes work by mechanical, thermal or chemical means: raising, compacting and fulling rearrange fibers; heat setting relaxes and locks thermoplastic structure above its glass transition; mercerization swells cotton in roughly 20 to 26 percent sodium hydroxide; repellent finishes change surface energy. Durable water repellents show why a finish needs chemistry and testing, not just a name. After long-chain PFAS were phased out, alternatives fell into four groups: side-chain fluorinated polymers, silicones, hydrocarbons and other chemistries such as dendrimers and inorganic nanoparticles, and the non-fluorinated options lack oil repellence. Side-chain fluorinated polymers are barely extractable, so one study found extraction-based analysis captured roughly 25 to 50 times less fluorine than oxidation or hydrolysis methods. Durability is tested after laundering: one fluorine-free silica and silicone finish, applied by pad-dry-cure, kept top spray ratings after five standard wash cycles.
A practical example
If two fabrics share the same composition and weave but have different surfaces, a finishing difference may help explain the result. Ask what treatment was applied, what property it is intended to change, and whether that property was measured after repeated care cycles.
What to distinguish
A finish can alter the impression created by the underlying fiber. Initial softness or smoothness alone cannot identify the fiber or establish long-term performance. Avoid assuming that a treatment’s presence tells you its durability.
Origins and history
Finishing is as old as cloth making. Roman fullers cleaned and finished wool cloth with urine and absorbent clays, and the clay called fuller's earth is named for that work. Chemical finishing entered the industrial era with John Mercer, a Lancashire calico printer who observed the action of caustic soda on cotton in 1844 and patented the treatment in 1850; Horace A. Lowe patented treatment under tension, which produces luster, in 1889. Heat setting became essential with melt-spun synthetic fibers in the mid-twentieth century.
Related terms
Sources & further reading
- CottonWorks: Finishing
- Environment International: Properties, performance and associated hazards of state-of-the-art durable water repellent (DWR) chemistry for textile finishing (2016)
- Environmental Science: Processes and Impacts: Non-extractable PFAS in functional textiles (2023)
- Polymers: Octylsilane-modified amino-functional silicone coatings for a durable water-repellent textile finish (2025)
- Wikisource: 1911 Encyclopaedia Britannica, Mercerizing
Technical references reviewed 2026-09-22. Examples are illustrative. Industry organizations and manufacturers describe their own fields; their references are not independent product endorsements. Figures are approximate and depend on the stated test conditions.