In laundry shops, garments can be washed with cold or hot water. This is not just about temperature adjustment. Cold water washing does not mean rinsing garments with cold water. It means completing an entire wash cycle at a water temperature below 30℃ (or room-temperature water without heating). Cold water washing reflects a shift in laundry practices from the traditional concept “high temperature delivers better results” to modern scientific consensus “low temperature improves cleaning performance”. It is driven by energy concerns, environmental pressure, and washing technology.
Key Benefits
Cold water washing is widely recognized for the following key benefits.
- Improve energy efficiency
Water heating in washers accounts for 75%-90% of total energy consumption. Cold water washing can reduce this heating cost. One washing cycle reduces electricity consumption by about 90%.
- Reduce costs
Laundry shops can significantly reduce electricity, steam, or gas costs.
- Extend fabric service life
Hot water accelerates fiber aging, color fading, and shrinkage. Cold water protects garments. It also extends fabric service life and reduces replacement frequency. This reduces fabric wastage at the source.
More importantly, modern laundry technology improves the cleaning performance of cold water washing. A lot of enzyme-based detergents ( protease, amylase, lipase) and high-performance surfactants are designed for low-temperature washing. At temperatures of 20-30℃, they can be activated to remove various stains. The cleaning power is comparable to hot water washing. They even perform better on some complex stains.
Common Misconceptions
- Misconception 1
Cold water cannot deliver efficient results as hot water. Actually, cold water with modern detergents can remove sweat stains, food residues, and dust particles on daily garments. When processing pure grease or requiring disinfection, hot water has more advantages. But disinfection can be replaced by disinfectants, without relying on high temperature.
- Misconception 2
Only hot water can kill bacteria. During laundry operations, daily garments do not require high-temperature disinfection. Most microorganisms can be removed by surfactant action and mechanical agitation. For any disinfection requirements (washing patient garments), add oxygen-based or quaternary ammonium compound disinfectants. Cold water washing can meet safety standards.
- Misconception 3
Cold water can only remove slight stains. For heavily soiled garments, the key is pretreatment rather than water temperature. Perform cold water washing after localized treatment by stain removers. The results far exceed blindly using hot water washing.
How to Shift from Hot Water to Cold Water Washing
Laundry shops should understand that cold water washing is not simply about adjusting water temperature. They should focus on the following points.
- Infrastructure assessment
Check whether current washers have specialized cold water programs or energy-saving modes. Old machines may need to be replaced. So laundry shops should choose smart equipment. Kingstar wet cleaning machine has precise temperature control devices. It also supports setting different parameters for cold or hot water.
- Proper detergents & precise dosing
Choose professional detergents. They can be used for cold water washing. At the same time, the enzymes and surfactants can be optimized for low temperature. A wet cleaning machine has an automatic dosing system. It precisely controls dosage to avoid wastage or detergent residues. - Employee training
Provide training for operators. They should understand the principles and advantages of cold water stain removal. This helps them change their original working habits.
Technology Support
Cold water washing is based on three major technologies.
- Enzyme-based detergent
At low temperatures, enzyme-based detergents have protease and amylase with high enzymatic activity. They can accurately break down protein-based, starch-based, grease, and other types of stains.
- High-performance surfactants
They reduce water surface tension. At the same time, surfactants can improve cold water’s wetting and penetration ability into fabrics. Therefore, stains are easier to remove.
- Efficient industrial washer
Based on different fabrics, a Kingstar wet cleaning machine can set spin speed and rotation-to-stop ratio. It uses a proper inner drum diameter. Mechanical action can make up for the lack of thermal energy. This achieves the same cleaning performance in cold water.
Due to the above three technologies, cold water washing is a preferred choice rather than a compromise.
Conclusion
Cold water washing is not a trend, but a systematic innovation based on chemical, mechanical, operational, and regulatory factors. It tells laundry operators that cleaning does not depend on high temperature. Its performance is affected by the combination of scientific formula and overall design. In the future, cold water washing will become the new normal in the laundry industry. This is not only a protection for customers’ garments, but also a protection for the environment.
Q&A
Q1: What are the dimensions of Kingstar 25 kg wet cleaning machine’s inner drum?
A1: The inner drum diameter is 750 mm while the depth is 566 mm. The large diameter can improve washing results.
Q2: Is garment sorting needed before cold water washing?
A2: Yes. Some fabrics have poor color fastness. For example, they may bleed color at low temperatures.
Q3: How does cold water washing improve cleaning results?
A3: Remove stubborn stains from garments before washing. Use low-temperature detergents. They can improve cleaning results. Meanwhile, they also help protect garment colors.
