Wet Cleaning vs Dry Cleaning
The short version. Dry cleaning washes garments in a chemical solvent. Wet cleaning washes them in water, using detergents and machine programs built for the job. Both are professional processes, both are done by trained operators on commercial equipment, and each is better than the other at particular things.
The actual difference
The word “dry” in dry cleaning has always been a little misleading. The garment gets thoroughly wet — just not with water. It is immersed in a solvent, most often tetrachloroethylene (perchloroethylene, or perc) or a hydrocarbon solvent, which dissolves oils and greases without swelling natural fibres.
Wet cleaning uses water, which does swell natural fibres — and that is precisely the problem it had to solve. The solution was not a better detergent alone. It was control. A wet cleaning machine governs water level, mechanical action, temperature and cycle time to a program matched to that class of garment, and the drying is stopped at a residual moisture level rather than run to bone dry. The finishing is then done by hand on tensioning equipment built for the purpose — a form finisher, a trouser topper, a pressing table.
Take any one of those elements away and you are washing clothes. Together, they are a professional process with its own international standing.
What the care label tells you
Wet cleaning is not a workaround for the care label. It has its own symbol under ISO 3758, the international care-labelling code. The circle symbols on a garment label work like this:
| Symbol | Meaning |
|---|---|
| W in a circle | Professional wet cleaning. One bar under the circle means gentle, two bars means very gentle, and a crossed-out W means do not wet clean. |
| P in a circle | Professional dry cleaning in tetrachloroethylene (perc) or any of the milder solvents. |
| F in a circle | Professional dry cleaning in hydrocarbon solvent only — perc is excluded as too aggressive for that garment. |
Two practical consequences follow. A garment marked with a circled W is asking for wet cleaning, and a cleaner without the process has to turn it away or improvise. And a garment marked “do not dry clean” has not necessarily been ruled out of professional care — it may simply be unsuitable for solvent.
Where wet cleaning is the better process
- Anything solvent attacks. Beading, sequins, flocking, heat transfers, printed motifs, some adhesives and trims, and polyurethane coatings can soften, lift or delaminate in solvent.
- Water-soluble soiling. Perspiration, most food and drink, blood, and general body soil are water-based. Solvent is poor at all of them, which is why they are so often pre-spotted by hand before a dry clean.
- Odour. Garments come back smelling of nothing in particular rather than faintly of solvent.
- Anything worn against skin. No solvent residue is left in the fibre.
Where dry cleaning still wins
Any honest comparison has to include this, and the trade knows it anyway.
- Heavy oil and grease. Solvent dissolves them directly. Wet cleaning relies on surfactants and mechanical action, and on badly oil-stained workwear the solvent will usually do a better job in one pass.
- Some structured tailoring. Fused canvases, particular interlinings and certain shoulder constructions can distort in water. A skilled operator with the right program and finishing equipment handles most of it, but “most” is not “all”.
- Throughput on the finishing side. Wet cleaned garments need more finishing time than solvent-cleaned ones. That is a real cost, and it is the thing plant owners most often underestimate.
This is why most plants that adopt wet cleaning run it alongside solvent rather than instead of it. The two processes cover different failure modes, and having both means very few garments have to be refused.
What it means if you run a plant
The operational case is straightforward. There is no solvent to purchase, store, filter or recover. There is no hazardous waste contractor, no still residue, no vapour monitoring, and no solvent-handling exposure for your staff. Energy consumption is lower and the machinery needs less maintenance, because there is no distillation and no solvent recovery circuit to keep in order.
The compliance position matters too. In NSW, the EPA is explicit that dry cleaners carry legal responsibilities to protect their staff and the environment from perc, which it describes as a suspected cancer-causing chemical. Internationally the direction of travel is clear: the United States EPA finalised a risk-management rule for perc in December 2024 that phases out its use in dry cleaning there. Australia has not followed, and there is no announced phase-out here — but a process with no solvent at all is not exposed to that question whichever way it goes.
What it takes to add it
Less than most cleaners expect. A modern washer-extractor with programmable water levels and a moisture-sensing dryer will already do the wash and dry side. What most plants add is finishing equipment and the chemistry, plus operator training on the programs. Spencer Systems supplies the LANADOL range and the finishing machinery across Australia, installs it, and trains your operators.
If you want to know specifically what your plant would need, tell us what you are running now and we will give you a straight answer.
Weighing it up for a plant? What wet cleaning actually costs to run sets out the six cost lines that change, and why comparing chemistry prices gives you the wrong answer.
