Prolonged exposure to certain fluids can cause rashes, itching, peeling, and, in severe cases, painful skin ulcers.
As a trusted industrial lubricant supplier, Hai Lu Jya He shares insights from our fluid specialists on the causes of cutting oil allergies—and practical ways to prevent them, protecting both your team and productivity.

(1). Chemical Composition of Cutting Oil (Irritants)
Cutting fluids are blends of mineral, synthetic, or semi-synthetic oils with various performance additives.While these additives improve machining efficiency, some like preservatives, emulsifiers, and EP agents - can irritate sensitive skin or trigger allergic reactions.

(2). Fluid pH Imbalance (Corrosion and Contamination)
pH level is a key indicator of fluid health and operator safety:
■ High pH (Above 9.5): Overly alkaline fluids strip away the skin’s natural oils, causing dryness, irritation, and potential chemical burns.
■ Low pH (Below 8.0): Often a sign of bacterial or fungal contamination. This promotes microbial growth, unpleasant odors, and increases the risk of infections or allergic reactions.

(3). Airborne Mist and Biological Contamination
The machining environment itself plays a major role in exposure risks:
■ Cutting Fluid Mist: High-pressure machining creates fine mist particles that can cause skin and respiratory irritation.
■ Bacterial Growth: Poor maintenance allows bacteria to thrive in coolant tanks, increasing the risk of skin infections and allergies.

✅ SOLUTIONS: 5 Effective Prevention Strategies

Preventing cutting oil dermatitis requires a holistic approach that combines the right fluid selection, consistent maintenance, and proper personal care. By choosing low-allergen, health-conscious cutting oils, monitoring pH and concentration, keeping equipment clean and well-ventilated, using protective gear, and maintaining good skin hygiene, operators can greatly reduce irritation and allergy risks. Supported by Hai Lu Jya He’s advanced solutions - such as the MORESCO and WILL AIE series - manufacturers can achieve a safer, more comfortable, and more productive machining environment.

(1) Choose Low-Allergen, Safe Cutting Fluids
■ Use eco-friendly, certified fluids free from formaldehyde, nitrites, and chlorinated compounds.
■ Try MORESCO and WILL AIE series from Hai Lu Jya He — formulated to reduce skin irritation while maintaining top machining performance.

(2) Monitor Fluid pH and Concentration Regularly
Keep your cutting fluids balanced to prevent irritation and bacteria growth.
■ Check pH and concentration frequently.
■ Maintain a slightly alkaline range (8.5–9.5) by topping up with fresh fluid.

(3) Keep Machines Clean and Work Areas Ventilated
A clean, well-ventilated workspace prevents contamination and mist exposure.
■ Clean oil tanks, sumps, and filters regularly to remove residues and chips.
■ Use ventilation or mist collectors to minimize airborne cutting fluid particles.

(4) Use Proper Personal Protective Equipment (PPE)
Protect your skin from direct contact with cutting fluids.
■ Wear oil-resistant gloves (like nitrile) and long-sleeved clothing.
■ Change gloves often and avoid wearing damp clothing.

(5) Maintain Good Skin Hygiene and Care
Healthy skin is the best defense against irritation.
■ Wash hands and exposed skin with mild, pH-neutral cleansers after work.
■ Avoid harsh soaps and apply a moisturizer or barrier cream to restore the skin’s natural protection.

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