Assembly Line

How dish soap is made

Dish soap is not soap at all, because real soap would leave a film in hard water.

stations
6
things upstream
33
raw sources
14
steps from the ground
7

The short version

Dish soap is a cold or gently warmed blend, not a reaction. Plants weigh and test the raw materials, then charge large tanks with purified water and primary surfactants. Hydrotropes keep the concentrate dissolved, and thickeners, color and fragrance go in late. After tests for viscosity, clarity and cleaning power, it goes to automatic fillers, cappers and labelers.

  1. Weigh and test

    Cleaning chemicals, foaming agents and additives are weighed and tested so the ratio matches the formula.

  2. Charge the tank

    Purified water and primary surfactants go into large mixing tanks with automatic stirrers, with temperature and time held under control until everything has dissolved.

    Goes in
    Water

  3. Add foam boosters

    Milder secondary surfactants bring extra foam, and hydrotropes such as sodium xylene sulfonate stop the concentrate from separating.

  4. Thicken, scent and color

    Thickeners, colorants and fragrances come in late in the mixing cycle. Salt can help build thickness.

    Goes in
    Table saltPerfume

  5. Test the batch

    Samples are checked for viscosity, clarity and cleaning performance before any bottle is filled.

  6. Fill, cap and label

    An automatic filler doses an exact volume in each bottle. Cappers seal them against leaks, labelers finish them, and they are inspected and boxed.

    Goes in
    Plastic bottle
End of the lineDish soap

Worth repeating

  • Procter & Gamble introduced Joy in 1949, as one of the first nationally marketed liquid dish soaps in the United States.
  • Dawn, launched in 1973, is also used by wildlife rescuers to clean oil off birds and marine mammals.
  • The antibacterial agent triclosan, once added to some dish liquids, has been banned in the United States, the European Union and elsewhere.

Back to the ground

Follow every input upstream and dish soap starts as these 14 raw sources.

WaterRock saltSeawaterOrangesVanilla podsCornSugarcaneSilica sandLimestoneNatural gasTronaSugar beetCrude oilAir

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Keep walking

Laundry detergent 7 stations · 18 raw sources Champagne 8 stations · 22 raw sources Liquefied natural gas 5 stations · 1 raw source Bourbon 6 stations · 19 raw sources Cotton candy 9 stations · 17 raw sources Mascara 6 stations · 13 raw sources

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Sources

Cite this page: "How dish soap is made." Assembly Line, 2026-11-03. https://assemblyline.org/make/dish-soap

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