Sofa
A large soft surface whose cleaning code was decided at the factory. A furniture manufacturer and the leather trade both prohibit the same vacuum attachment.
Start here
What this is, what tends to go wrong with it, and what to do about it.
Made from
Which part are you cleaning?
These parts take different answers. Cleaning one the way you clean another is a common way to damage this.
- Sofa armrest
The part of a sofa that takes skin contact rather than spills, so what builds up there is body oil — and it darkens gradually enough to go unnoticed.
Upholstery fabric
Things not to use here
What tends to go wrong
Fats and oils, which water alone cannot lift. Removed by surfactants, by heat, by solvents, or by alkalis that convert the fat into soap.
Why it is difficult: Why oil resists water, Emulsification
Mostly textile fibres and skin, held by static as much as by gravity — which is why a dry cloth on a plastic surface makes it worse.
Why it is difficult: Static and dust, Mechanical action and abrasion, Why different surfaces get different dirt, Surface roughness
A pigment stain from anthocyanins and tannins. Responds to oxidising bleaches rather than to detergents, and gets much harder once dried or heated.
Why it is difficult: Pigment retention, Penetration into fibres, Why a stain comes back after it dries
A tannin stain that behaves like red wine and unlike grease. Detergent first, then a mild acid — and the order matters.
Why it is difficult: Pigment retention, Why old stains are harder
Sweat itself has almost no smell. What you can smell is bacteria eating it — and which bacteria depends on what the garment is made of.
Why it is difficult: Classifying a stain by its origin
Not a hygiene failure and not removable by cleaning alone. They live on shed skin in soft furnishings, and humidity governs them more than vacuuming does.
Why it is difficult: Why different surfaces get different dirt, Moisture control and recurrence
- Mouldvia its material
A living growth, not a stain. Killing it and removing the staining are two separate jobs, and neither addresses the moisture that caused it.
Why it is difficult: Porous and non-porous surfaces, Moisture control and recurrence, Cleaning, sanitising and disinfecting, Organic load, Surface roughness
- Cellulolytic microorganismsvia its material
The fungi and bacteria that digest cotton, linen and paper by converting the fibre itself into sugar. The damage is not staining, it is the material being eaten.
Why it is difficult: Organic load, Enzymes in cleaning
- Frass and pest residuevia its material
The powder, cast skins and webbing left by something that has been eating the fibre. The deposit is the least of it: the material it came from has gone.
Why it is difficult: Keratin digestion, Damage versus soiling
- Oil and grease on textilevia its material
The stain where the trade guidance switches from water to solvent — and the switch brings a warning the water route does not have.
Why it is difficult: Why oil resists water, Penetration into fibres, Why old stains are harder
- Makeup· no established method
An emulsion of oil, pigment and often silicone, formulated to stay put on skin. Two of those three need different treatments, in the right order.
Why it is difficult: Emulsification, Solubility and polarity
Anthocyanin pigment plus sugar and acid. The sugar is the part that turns an invisible dry mark into a brown one months later.
Why it is difficult: pH indicators in stains, Classifying a stain by its origin, Pigment retention, Why old stains are harder
Protein and fat in water, and the reason a dried milk spill smells long after the mark has gone is that the protein is still there.
Why it is difficult: Protein denaturation, Adsorption of odour molecules, Heat-set stains, Penetration into fibres
Fat, protein and starch in one deposit, and they need opposite treatments. The trade order is solvent first, and it is the reverse of the instinct.
Why it is difficult: Protein denaturation, Solubility and polarity, Heat-set stains, Why oil resists water
A sticky, yellow-brown tar film deposited everywhere at once. It is the reason a room smells after everything visible has been cleaned.
Why it is difficult: Adsorption of odour molecules, Solubility and polarity
Two stains in one bottle: an oily film, and a UV filter that forms a coloured complex with the iron in your water. The second one is why the mark comes out orange.
Why it is difficult: Chelation, Water hardness
Not a spill. Colour walking off one material onto another under pressure and friction, and on pale leather a manufacturer says it WILL happen.
Why it is difficult: Dye migration and colour bleeding
The science behind this: What the W, S, WS and X code on furniture means, Penetration into fibres, Why plant fibres turn brown when they dry slowly, How care labels work, Adsorption of odour molecules, Solvents and polymers
In detail
A sofa is an upholstery problem, and upholstery is unusual in that the manufacturer has already decided what may be used on it — the cleaning code on the label distinguishes fabrics that may be cleaned with water, those that need a solvent, those that accept either, and those that may only be vacuumed. The furniture industry's own standard says the code describes whether the fabric's yarns stay colourfast to water, solvent or both, and does not reflect whether the fabric can withstand a particular cleaning method. A furniture maker's care document gives the routine and the prohibition. Normal cleaning is vacuuming with an upholstery attachment, and a vacuum attachment with a rotary brush must not be used, because brushing may permanently damage the nap or change the character of the fabric. One manufacturer's panel and workspace fabrics carry two categorical restrictions worth knowing about any unlabelled fabric: do not apply water or any liquid solution, and do not use steam. Its spot-cleaning instruction is counter-intuitive and useful — soak up the stain immediately with a soft absorbent cloth and do not dry the stain completely, because it may set.
Why
- Sofa is explained by What the W, S, WS and X code on furniture means
Related
- Sofa has the component Sofa armrest
- Sofa is made from Upholstery fabric
- Sofa is made from Polyester
- Sofa is made from Finished leather
- Sofa is commonly affected by Grease
- Sofa is commonly affected by Dust
- Sofa is commonly affected by Makeup
- Sofa is commonly affected by Red wine
- Sofa is commonly affected by Coffee
- Sofa is commonly affected by Perspiration
- Sofa is commonly affected by House dust mites
- Sofa is commonly affected by Dust
Sources for this page
Sources
Materials: Textiles Care and Maintenance
Herman Miller, Inc. · Manufacturer documentation
Relied on for: That normal cleaning is vacuuming with an upholstery attachment, that a rotary-brush attachment must not be used, that some fabrics must not have water or any liquid solution applied, that steam must not be used, and that a stain must not be dried completely or it may set. (states this directly)
Woven & Knit Residential Upholstery Fabric Standards & Guidelines
Joint Industry Fabric Standards and Guidelines Committee, via the American Home Furnishings Alliance (AHFA) · Standards body
Relied on for: That the cleaning code on residential upholstery fabric describes whether its yarns stay colourfast to water, solvent or both, and does not reflect whether the fabric can withstand a particular cleaning method. (states this directly)