⚠️ Safety Precautions

• Methylene blue dye stains strongly: it marks skin, clothing and bench for days — wear gloves, add only a drop or two, and wipe spills at once.
• Oils are flammable: keep kerosene/vegetable oil away from open flames; do not heat the emulsion near a burner.
• Electrical safety in the conductivity test: use a low-voltage supply, keep the circuit and electrodes clear of spills, and never touch bare electrodes while the supply is on.
• Do not taste or ingest anything: although milk, butter and oil are food emulsions, lab-grade reagents and dyes are not food — no tasting.
• Handle glass test tubes carefully when shaking to emulsify — hold the stopper firmly and point the tube away from people.