Use for care, cleaning and repair: how laundering actually works through the interaction of chemistry, temperature, mechanical action and time, surfactants, enzymes and water hardness, fibre-specific care and what genuinely needs dry cleaning, stain removal by stain class together with the chemical safety limits that go with it, drying, ironing and storage, and mending, moths and pest control.
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---
name: making-laundering-stain-removal-care-and-mending
description: "Use for care, cleaning and repair: how laundering actually works through the interaction of chemistry, temperature, mechanical action and time, surfactants, enzymes and water hardness, fibre-specific care and what genuinely needs dry cleaning, stain removal by stain class together with the chemical safety limits that go with it, drying, ironing and storage, and mending, moths and pest control."
---
# Fabric, Clothing and Furniture: How Laundering Actually Works, Fibre-Specific Care, Stain Removal, Drying, Ironing and Storage, and Mending and Pests
> **Part 4 of 5** of the *Making Fabric, Clothing and Furniture — and Caring for Them* reference (plugin `making-fabric-clothing-furniture-laundering`), covering §22–§26. Sibling skills: `making-fibres-yarn-weaving-knitting-and-dyeing` (§0–§7), `making-garment-drafting-seams-and-construction` (§8–§15), `making-woodworking-joinery-finishing-and-upholstery` (§16–§21), `making-reference` (§27–§32). Section numbers are shared across the set; a reference written as §N → `skill` points into that sibling skill.
>
> **Currency:** The crafts are centuries old and stable. Two areas moved. See §27 → `making-reference` for microfibre shedding and filter regulation, and PFAS restrictions in textiles and furniture.
> **⚠️ Four crafts unified by one principle: the MATERIAL'S behaviour determines
> everything downstream.** ⚠️ **Fibre decides yarn, which decides fabric, which decides
> what garment is possible and how it must be washed.** **Wood species and grain decide
> joinery, which decides what will survive a winter of dry indoor air.** **⚠️ Almost every
> failure in this document is someone fighting the material instead of designing with it.**
>
> **Complements a cooking/cleaning/waste reference (surfactant chemistry and disinfection
> in general), and a materials or thermo reference for the underlying physics.**
>
> **⚠️ GOTCHA** boxes mark the received wisdom that's wrong, and the mistakes that destroy
> the work irreversibly.
>
> **The three ideas that organize this document:**
> 1. **⚠️ GRAIN is the master concept in both textiles and wood** (§8 → `making-garment-drafting-seams-and-construction`, §16 → `making-woodworking-joinery-finishing-and-upholstery`). **Fabric
> behaves differently along the warp, the weft and the bias; wood moves across the
> grain and not along it. Both wreck the work when ignored.**
> 2. **⚠️ Wood MOVES, seasonally and forever** (§16 → `making-woodworking-joinery-finishing-and-upholstery`). **Every joinery decision in §17 → `making-woodworking-joinery-finishing-and-upholstery` is
> downstream of that one fact, and cross-grain construction is the single most common
> reason furniture self-destructs.**
> 3. **⚠️ Laundering has four interchangeable levers** (§22). **Temperature, chemistry,
> mechanical action and time trade off against each other — which is why cold washing
> works if you adjust the others, and fails if you don't.**
---
## §22. ⚠️ How Laundering Actually Works
**⚠️ SINNER'S CIRCLE: four factors that trade off against each other. Reduce one and you
must increase another to get the same result.**
```
⚠️ TEMPERATURE · CHEMISTRY · MECHANICAL ACTION · TIME
```
⚠️ **This is why cold washing works — modern detergents with effective enzymes and
surfactants substitute chemistry for temperature — and why cold washing with an old
detergent and a short cycle disappoints.**
```
DETERGENT COMPONENTS
⚠️ SURFACTANTS lift and suspend soil (hydrophilic head, lipophilic tail)
⚠️ ENZYMES protease (protein), amylase (starch), lipase (fat),
⚠️ cellulase (removes fuzz and pills — and gradually thins cotton)
BUILDERS soften water so surfactant isn't wasted
⚠️ OPTICAL BRIGHTENERS fluorescent dyes that make white LOOK whiter.
⚠️ They don't clean anything, and they build up
⚠️ BLEACH chlorine (⚠️ NOT on wool, silk, elastane) vs OXYGEN
(percarbonate — gentler, colour-safe, ⚠️ needs warmth to activate)
```
**⚠️ Water hardness matters more than people think**: ⚠️ **hard water wastes surfactant and
deposits minerals that make fabric stiff and grey.** **In hard water use more detergent or
a builder, not more fabric softener.**
> **⚠️ GOTCHA — fabric softener is actively harmful to several fabric types.** ⚠️ **It
> works by depositing a cationic lubricant film, which destroys the absorbency of towels,
> ruins the wicking of technical activewear, degrades the flame-resistance of children's
> sleepwear, and builds up in microfibre.** **⚠️ For softening, white vinegar in the rinse
> or wool dryer balls do the job without the coating.**
**⚠️ Overloading is the most common laundering error** — ⚠️ **it removes the mechanical
action leg of Sinner's circle entirely**, **and clothes come out unclean regardless of what
you put in the drawer.**
---
## §23. Fibre-Specific Care
```
⚠️ COTTON/LINEN tolerate heat and agitation. ⚠️ Shrinkage is the risk
(unless pre-shrunk); hot drying is what actually shrinks garments
⚠️ WOOL ⚠️ NEVER heat + moisture + agitation together — that's felting,
and it is IRREVERSIBLE. Cool water, wool-specific (NEUTRAL or slightly
acidic) detergent, ⚠️ NO alkali, no wringing. ⚠️ Dry FLAT — wet wool
is heavy and hanging it stretches the garment permanently
⚠️ SILK ⚠️ alkali-sensitive; no chlorine bleach; ⚠️ sunlight degrades it.
Cool water, neutral detergent, avoid prolonged soaking
⚠️ RAYON/VISCOSE ⚠️ VERY weak wet (§1). Support the weight; don't wring;
often genuinely dry-clean-only
⚠️ POLYESTER easy, but ⚠️ holds oils and odour. Wash promptly, use a
detergent with lipase, avoid fabric softener, and ⚠️ avoid high heat
which sets oily stains permanently
⚠️ ELASTANE BLENDS ⚠️ heat kills elastane. Warm wash at most, air dry
DOWN ⚠️ needs a specific detergent and thorough drying with agitation
(dryer balls) or it clumps and mildews
```
**⚠️ "Dry clean only" vs "dry clean"**: ⚠️ **the former is a genuine warning (structure,
interfacing, dye, or fibre); the latter is often the manufacturer being cautious.**
**⚠️ Home dry-cleaning kits are a dryer-based refresh, not solvent cleaning.**
---
## §24. Stain Removal
```
⚠️ THE UNIVERSAL RULES
⚠️ BLOT, never rub — rubbing drives it in and abrades the fibre
⚠️ COLD water FIRST on unknown stains. ⚠️ HEAT SETS protein and many
other stains permanently. This is the mistake that ruins garments
⚠️ Work from the OUTSIDE of the stain inward
⚠️ Test on a hidden area
⚠️ NEVER put a stained garment in the dryer — heat sets what remains
⚠️ BY CLASS — match the chemistry to the stain
PROTEIN (blood, egg, dairy, sweat) ⚠️ COLD water + enzyme (protease).
⚠️ Hot water cooks it into the fibre
TANNIN (tea, coffee, wine, fruit) ⚠️ hot water + detergent;
⚠️ NO soap-based bar (soap sets tannin)
OIL/GREASE ⚠️ solvent or a degreasing detergent, warm.
⚠️ Absorbent powder (cornstarch) first on fresh grease
DYE (grass, ink, berry) ⚠️ alcohol or oxygen bleach
COMBINATION (makeup, gravy, chocolate) ⚠️ treat the GREASE first,
then the pigment
RUST ⚠️ acid/oxalic — ⚠️ chlorine bleach makes rust stains WORSE
```
**⚠️ Old stains that "reappear"** are ⚠️ **usually residual sugar or tannin that oxidizes,
or detergent residue wicking soil back** — **rinse more thoroughly.**
---
## §25. Drying, Ironing and Storage
**⚠️ Drying**: ⚠️ **heat is what causes most shrinkage, damages elastane, and sets stains.**
**Line-dry where practical; ⚠️ dry knits and wool FLAT; ⚠️ sun bleaches (useful on white
cotton, destructive on silk and coloured fabric).**
**⚠️ Lint in the dryer is your clothing eroding** — **and the lint filter is a fire hazard
when neglected.**
**⚠️ Ironing temperature by fibre** (⚠️ **synthetics melt — start low; use steam on cotton
and linen; press wool with a cloth; ⚠️ iron silk damp and on the reverse**).
**⚠️ Storage**: ⚠️ **clean before storing (soil and body oils attract pests and set into
stains); breathable cotton, not plastic (⚠️ plastic traps moisture and yellows textiles);
⚠️ fold knits, hang wovens; acid-free tissue for heirlooms; and ⚠️ never store in a
cardboard box long-term — the acid migrates.**
---
## §26. Mending and Pests
**⚠️ Mending**: **darning (⚠️ weaving a new patch across a hole), Swiss darning/duplicate
stitch for knits, patching (⚠️ from the inside, on the grain), sashiko and visible mending,
reweaving, and button and zip replacement.**
**⚠️ Reinforce BEFORE the hole**: ⚠️ **thin areas are far easier to save than holes, and
elbow, knee and crotch wear is predictable.**
> **⚠️ GOTCHA — clothes moths and carpet beetles eat KERATIN, so they attack wool, silk,
> fur and feathers, not cotton or synthetics.** ⚠️ **The larvae do the damage, not the
> adults, and they prefer soiled fabric — sweat, food and body oils are what attract
> them.** **⚠️ Therefore: CLEAN before storing is the single most effective control.**
> **⚠️ Cedar and lavender are repellents at best and do not kill larvae; freezing
> (several days at −18°C, ideally with a thaw and refreeze cycle) or thorough heat does.**
> **Sealed containers and vacuuming the dark undisturbed places — under furniture, closet
> corners — is the rest of it.**
---
# PART V
