--- title: Step‑by‑Step Guide to Formulating a Low‑Suds Liquid Detergent for High‑Efficiency Washers siteUrl: https://logzly.com/detergentinsider author: detergentinsider (Liquid Detergent Insider) date: 2026-06-15T20:35:09.594727 tags: [detergent, sustainability, hewashers] url: https://logzly.com/detergentinsider/stepbystep-guide-to-formulating-a-lowsuds-liquid-detergent-for-highefficiency-washers --- **Disclosure: We are reader supported, and earn affiliate commissions when you buy through us.** Why you should care right now: [HE (high‑efficiency) washers](/detergentinsider/how-to-design-a-commercial-liquid-detergent-that-meets-new-sustainability-rules) dominate the market, yet many brands still ship “regular” formulas that over‑foam, waste water, and even trigger [error codes](https://www.amazon.com/s?k=error+codes&tag=organizationtip101-20). A low‑suds detergent not only keeps the machine happy, it also saves energy and water – a win for the consumer and the planet. ## 1. Know the Goal Before You Mix Anything The first rule of any formulation is to write down the performance targets in [plain language](https://www.amazon.com/s?k=Plain+Language&tag=organizationtip101-20). For a low‑suds [HE detergent](https://www.amazon.com/s?k=HE+detergent&tag=organizationtip101-20) those targets usually look like this: * **Suds level** – less than 5 % of the total volume in a standard test. * **Cleaning power** – at least 90 % removal of a standard [soil blend](https://www.amazon.com/s?k=soil+blend&tag=organizationtip101-20). * **Stability** – 12 months shelf life at 25 °C. * **Safety** – skin‑friendly, non‑corrosive, and compliant with [local regulations](https://www.amazon.com/s?k=local+regulations&tag=organizationtip101-20) (e.g., EPA, REACH). I still remember the first time I walked into a plant where the line was stopped because the detergent was foaming like a [bubble bath](https://www.amazon.com/s?k=bubble+bath&tag=organizationtip101-20). The engineers were scrambling, the machine was beeping, and I realized that “low‑suds” is not just a marketing phrase – it’s a hard engineering constraint. ## 2. Pick the Right Surfactants Surfactants are the workhorses that lift dirt off fabric. In a low‑suds formula you need a blend that provides cleaning without generating a lot of foam. ### 2.1 Primary (Anionic) Surfactant * **Linear alkylbenzene sulfonate (LAS)** – classic, cheap, good at removing oily stains. * **Why it works for low‑suds:** LAS has a moderate foam‑forming tendency, but when you keep the concentration below 5 % the foam stays manageable. ### 2.2 Secondary (Non‑ionic) Surfactant * **Alcohol ethoxylates (AE)** – excellent at breaking down greasy soils and they are low‑foam by nature. * **Tip:** Use 2‑3 % AE to boost cleaning while keeping suds down. ### 2.3 Foam Suppressor (Co‑surfactant) * **Silicone‑based antifoam** – a few drops per 100 L are enough to kill excess bubbles. * **Caution:** Too much antifoam can reduce cleaning power, so add it at the end and test. ## 3. Builders – The Unsung Heroes Builders soften water, keep minerals from interfering with surfactants, and help soil stay suspended. * **[Sodium carbonate (washing soda)](/detergentinsider/how-to-formulate-a-high-efficiency-commercial-liquid-detergent-that-meets-new-eu-sustainability-standards))** – raises pH, improves grease removal. * **Sodium citrate** – chelates calcium and magnesium, works well in low‑temperature cycles. * **Zeolite 4A** – a solid‑phase builder that reduces phosphates, a nod to sustainability. A typical HE blend might contain 10 % sodium carbonate, 5 % sodium citrate, and 3 % zeolite. Adjust based on local water hardness data. ## 4. Enzymes – Boost Cleaning Without Adding Foam Enzymes target specific stains (protein, starch, oil) and they work at low concentrations, so they don’t affect suds. * **Protease** – for blood and food proteins. * **Amylase** – for starches like [pasta sauce](https://www.amazon.com/s?k=pasta+sauce&tag=organizationtip101-20). * **Lipase** – for oil and grease. Add enzymes after the [bulk ingredients](https://www.amazon.com/s?k=bulk+ingredients&tag=organizationtip101-20) have cooled below 40 °C to protect their activity. A typical dosage is 0.1 % of the total formula. ## 5. Solvents and Viscosity Modifiers Liquid detergents need the right flow properties to be pumped and poured. * **Water** – the main carrier, usually 70‑80 % of the mix. * **[Propylene glycol](https://www.amazon.com/s?k=Propylene+Glycol&tag=organizationtip101-20)** – helps keep the formula from separating and adds a mild humectant feel. * **[Hydroxyethyl cellulose](https://www.amazon.com/s?k=hydroxyethyl+cellulose&tag=organizationtip101-20)** – a natural thickener that keeps the product from being too runny. Keep the total solvent blend under 20 % to avoid diluting the [cleaning agents](https://www.amazon.com/s?k=cleaning+agents&tag=organizationtip101-20). ## 6. Preservatives and Fragrance Even a low‑suds detergent needs to stay microbe‑free. * **Phenoxyethanol** – broad‑spectrum preservative, low odor. * **Fragrance** – optional, but if you add it, choose a low‑volatile oil that won’t interfere with foam control. ## 7. The Mixing Process – Order Matters 1. **Charge water** into the mixing tank, heat to 45 °C. 2. **Add builders** (sodium carbonate, citrate, zeolite) while stirring. Dissolve completely. 3. **Introduce primary surfactant** (LAS) slowly to avoid localized high foam. 4. **Blend in secondary surfactant** (AE) and keep the agitator speed moderate. 5. **Cool the mix** to below 40 °C before adding enzymes, preservatives, and fragrance. 6. **Add antifoam** dropwise, testing foam level after each addition. 7. **Adjust pH** to 9.5–10 using a small amount of [sodium hydroxide](https://www.amazon.com/s?k=sodium+hydroxide&tag=organizationtip101-20) if needed. 8. **Final viscosity check** – if too thin, add a pinch more hydroxyethyl cellulose; if too thick, thin with a little water. Throughout the process, run a quick “foam test”: fill a 1 L beaker with 100 mL of the detergent, agitate at 1200 rpm for 30 seconds, and measure the foam height. Aim for less than 30 mm. ## 8. Quality Checks Before You Ship * **Cleaning efficacy** – use the standard “AATCC 61” soil removal test. * **Foam test** – as described above, repeat at 5 °C and 30 °C to simulate cold and warm loads. * **Stability** – store a sample at 40 °C for 2 weeks, then check for phase separation or odor change. * **[Regulatory compliance](https://www.amazon.com/s?k=Regulatory+Compliance&tag=organizationtip101-20)** – verify that all ingredients are on the approved list for your target market. ## 9. Packaging Considerations Low‑suds formulas often have a higher water content, so the packaging must protect against leakage and oxidation. * **[Recycled PET bottles](/detergentinsider/how-to-design-a-commercial-liquid-detergent-that-meets-new-sustainability-rules)** with a UV‑blocking cap are a good balance of sustainability and performance. * **[Pump dispensers](https://www.amazon.com/s?k=pump+dispensers&tag=organizationtip101-20)** help consumers use the right amount, reducing waste and over‑foaming. I’ve seen brands switch from heavy‑wall HDPE to lightweight PET and cut their [carbon footprint](https://www.amazon.com/s?k=carbon+footprint&tag=organizationtip101-20) by 15 % without sacrificing product safety. Small changes add up. ## 10. Scaling Up – From Lab to Plant When you move from a 5‑L lab batch to a 10,000‑L production run, keep these points in mind: * **Mixing time** – larger tanks need longer mixing to achieve homogeneity. * **[Temperature control](https://www.amazon.com/s?k=Temperature+Control&tag=organizationtip101-20)** – heat loss is greater in big vessels, so monitor closely. * **Batch-to-batch consistency** – use inline spectroscopic sensors to verify surfactant concentration in real time. A quick tip from my analyst days: keep a “formulation log” for each batch, noting raw material lot numbers, temperature profiles, and any deviations. It makes troubleshooting a breeze and satisfies auditors. Low‑suds liquid detergents are not a mystery reserved for giant labs. With the right surfactant blend, a few smart builders, and careful process control, you can create a product that sings in an [HE washer](https://www.amazon.com/s?k=HE+washer&tag=organizationtip101-20), saves water, and meets today’s sustainability expectations. The next time you hear a [washing machine](https://www.amazon.com/s?k=washing+machine&tag=organizationtip101-20) humming without a mountain of bubbles, you’ll know exactly how that calm was engineered.