Value Village ／ Clothing
This answer is a draft. It stays unpublished until legal review and source verification are complete.
"I washed my jumper and now it fits a child" is a failure story told the world over. Here we explain, from the way the fibre works, why knitwear shrinks, whether it can be brought back, and in which cases it cannot.
| Type | What is happening | Reversible? |
|---|---|---|
| Felting (shrink-milling) | The scales on the surface of the wool tangle together through water, heat and friction; the fabric becomes stiff and thick | No |
| Relaxation shrinkage | Yarn that was stretched during knitting and finishing returns to its original length in water. The fabric stays soft | Can recover to some extent |
[Verify] The restoration method is a general one described by textile bodies and the dry-cleaning trade; results cannot be assured. Check the meaning of the symbols on the Consumer Affairs Agency's "Care labelling" page.
It is the combination of temperature, water and friction (rubbing, a hard spin, the turning of a tumble dryer). Even in cold water, hard rubbing shrinks it.
Felted fabric does not stretch. For a piece that has gone stiff and felt-like, people in Japan have the idea of remaking it into small accessories.
Sometimes yes, sometimes no. Restoration at the cleaner is also limited to relaxation shrinkage. Ask "will it come back?" when you hand it in.
Softener reduces friction and static, but cannot prevent shrinkage caused by heat and strong mechanical action. Prevention is the labelled temperature, press-washing and drying flat.
Synthetic fibres do not felt the way wool does, but at high temperature (tumble dryer, boiling water) they can shrink or stiffen. The temperature on the label matters for synthetics too.
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https://www.caa.go.jp/policies/policy/representation/household_goods/guide/wash_02.html
https://www.qtec.or.jp/
https://www.zenkuren.or.jp/
⚠️ Editorial note: the source URLs above were identified by search. Our working environment cannot reach go.jp domains, so the contents have not been checked against the text. Verify every source before publication and record who checked it and when.
What we share here are ideas and everyday practices passed down among people living in Japan, together with general information drawn from public sources. They are not official recommendations, and they are not professional instruction. Practices vary between households and regions.
This is general information. Results vary from person to person and depend on your own conditions and surroundings.
Please decide for yourself, using your own judgement, whether any of this suits your situation. We cannot accept responsibility for any damage, loss or injury arising from following this article.
Follow the care label and the maker's instructions for any garment, shoe or bag. For expensive or sentimental items, ask a specialist cleaner or repairer.
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