A brushed scarf feels soft and warm in the showroom. A few weeks later it can be covered in small balls of fibre. The cause is not bad luck. The fibre, the yarn, the fabric and the finish all play a part. This post explains how pilling happens on zimski šalovi, štole i šalove, and what to put in your specification.
What brushing does to a scarf surface
Brushing, also called raising or napping, pulls fibres up out of the yarn. Raising lifts surface fibres to give hairiness, softness and warmth (Wikipedia, Textile finishing). This is why a brushed stole feels warmer and softer than the same cloth left flat.
The same action creates the raw material for pills. One knitwear brand states it plainly: raising fibres to soften yarn increases the risk of pilling (Ysé guide to pilling). So softness and pill resistance pull in opposite directions. A heavier brush gives a softer hand and more loose fibre on the face.
How a pill forms
Pilling happens in stages (US patent on pilling reduction):
- Fuzz. Rubbing pulls loose fibres to the surface.
- Entanglement. More rubbing tangles the loose fibres together into small balls.
- Break-off. With enough wear, the anchor fibres break and the pills fall away.
A pill stays on the fabric while the fibres that tie it down are unbroken (Wikipedia, Pill (textile)). The last stage decides how the scarf looks after a season of wear.
Why strong fibres keep their pills
Stronger fibres hold on to pills and stop them falling off (Wikipedia, Pill (textile)). Synthetic fibres also have higher strength and abrasion resistance (Wikipedia, Textile finishing). So pills on polyester and acrylic tend to stay visible. Some acrylic fabrics fuzz or pill easily, though low-pilling acrylic variants exist (Wikipedia, Acrylic fiber).
Wool behaves differently. Wool fibres are less tenacious, so they work free and break away, and wool pilling diminishes over time (Wikipedia, Pill (textile)). Blends need care. U mješavini, the stronger fibre holds the pills onto the cloth (Wikipedia, Pill (textile)). In a wool and acrylic scarf, the acrylic can keep wool fuzz anchored.
Viscose is a different case. Regular viscose has low durability and appearance retention, especially when wet (Wikipedia, rajon). Judge a brushed viscose blend after washing, not only dry.
Yarn and fabric choices that change pilling
- Fibre length. Longer fibres pill less than short ones, because there are fewer fibre ends (Wikipedia, Pill (textile)).
- Yarn twist. Spinning the yarn with a high twist is one way to reduce pilling (Wikipedia, Pill (textile)).
- Fabric tightness. Knitted fabrics pill more than woven fabrics, and a tight knit pills less than a loose one (Wikipedia, Pill (textile)).
- Construction can matter as much as fibre. One study of knitted wool fabrics found no significant pilling difference between pure wool and wool and acrylic in dry, relaxed fabrics, while the knit structure did change the result (Turkish Journal of Engineering and Environmental Sciences).
- Singeing. Burning off protruding fibres gives a less hairy surface and helps reduce pilling (Wikipedia, Textile finishing). It removes the very fibres that brushing raises, so the two finishes work against each other on the same face.
How wear and washing drive it
Washing and wearing make loose fibres push out from the cloth surface (Wikipedia, Pill (textile)). Everyday movement and friction work the shorter fibres out of the yarn (Ysé guide to pilling). On a scarf, the main rubbing points are the neck, the shoulder and the coat collar.
Napped fabrics have a known weak point. The loose ends of the raised fibres collect in clusters and ball up, particularly after use and laundering (US patent on napped bedding blankets). A brushed scarf that looks clean when new can change after its first wash.
What goes wrong in bulk
- The sample was brushed differently from bulk. More brushing gives a softer hand and more loose fibre. Finishes and fabric surface changes can have a large effect on pilling (ASTM pilling test method summary). A change in the finish can change the result.
- Pilling after a few wears. A strong fibre in the blend keeps the pills attached, so they build up instead of falling away.
- Shedding. Brushing leaves broken fibres on the surface. Loose fibre can come off onto a dark coat before it forms a pill.
- A changed yarn. Shorter fibres or a lower twist in bulk yarn put more fibre ends on the surface.
What to specify and check
- Name the fibre and the blend. Write the fibre content of every yarn. Do not accept “wool feel” ili “soft blend”.
- Name the finish. State brushed or unbrushed, which face is brushed, and whether the fabric is singed or sheared.
- Ask for a pill test on a washed sample. Fabrics should be tested after laundering or dry cleaning, ili oboje (ASTM pilling test method summary). Agree the wash method before testing.
- Use a standard pilling test. A Martindale or pilling-box test is suitable. The Martindale machine also tests for fabric pilling (Wikipedia, Martindale). Agree the pass level before bulk starts.
- Keep an approved reference. Seal a washed and an unwashed piece of the approved sample. Compare every bulk lot against it for hand, nap and surface after rubbing.
- Rub test the brushed face. Rub the brushed face against a dark cloth and look for loose fibre. Rub it against itself and look for fuzz and early pills.
- Choose the trade-off on purpose. If low pilling matters most, ask for longer fibres, higher twist, a tighter construction and a lighter brush. If softness matters most, expect some pilling and favour a fibre that lets pills wear off.
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