In food quality control and dairy testing laboratories, removing complex fat and sugar emulsions—such as butter and ice cream—presents a dual challenge. Butter forms a dense, hydrophobic lipid layer, while ice cream leaves behind sticky proteins, sugars, and gums. Furthermore, when these samples are handled in aluminum vessels, standard alkaline detergents cannot be used due to severe metal corrosion risks.

This case report details how XPZ Automatic Laboratory Washers achieve total decontamination while preserving sensitive aluminum surfaces.

1. Residue Assessment: Butter & Ice Cream on Aluminum Vessels

• Residue Matrix: High concentrations of animal lipids, emulsified dairy proteins, and sugars firmly adhering to the interior walls and bottom of the vessel.

• Substrate Sensitivity: Aluminum is a chemically active metal. Exposure to conventional alkaline or strongly acidic cleaning solutions leads to surface oxidation, discoloration, and structural pitting.

2. Optimized Rack Loading and Positioning

• Inverted Positioning: Aluminum vessels are positioned upside down at a precise angle inside specialized stainless steel wire mesh baskets.

• Direct Vector Coverage: This orientation allows high-pressure fluid jets from rotating spray arms to directly penetrate the vessel interior while ensuring full gravity drainage without liquid pooling.

3. Calibrated Wash Cycle: Thermal Hydrodynamics & Neutral Detergent Chemistry

The Aurora-F3 model was utilized for this application

• Neutral Detergent Dosing: To protect active aluminum surfaces, the washer automatically doses a specialized neutral pH cleaning agent, effectively emulsifying stubborn lipids without chemically reacting with the metal substrate.

• Thermal Hydrodynamics: The system combines controlled wash temperatures with multidirectional hydraulic spray impact to rapidly melt butter fat and dissolve dairy sugar matrices.

4. Final Inspection Results: Zero Residue, Pristine Finish

• Total Residue Removal: Both interior and exterior surfaces emerge completely clean, with all hydrophobic lipid films, proteins, and sugar residues fully removed.

• Substrate Preservation: The aluminum surface shows zero oxidation, darkening, or surface damage, maintaining factory-grade cleanliness for subsequent testing cycles.

Conclusion

This cleaning validation demonstrates that XPZ Automatic Laboratory Washers deliver a complete cleaning solution for complex food residues. By pairing precise temperature control with safe, neutral detergent dosing, XPZ washers ensure maximum cleanliness while protecting delicate metal labware.