

Yi-Chun LinPh.D.Taiwan
Laser Materials ProcessingPublished
Dec 16, 2025
Ceramic Glaze Deposits Contamination
Ceramic-glaze contamination consists of vitrified silicate residues that form during high-temperature firing in ceramic manufacturing, so layer adheres tightly to surfaces after cooling. This contamination shows unique glassy hardness and chemical inertness, which distinguish it from softer organic residues or metallic scales, and on materials like porcelain or alumina, it behaves as a uniform coating that resists cracking under stress. Removal faces challenges from its durable bond, but laser cleaning proves effective because precise energy pulses ablate the glaze selectively, so substrate remains undamaged during treatment.
Safety Information
Critical safety data for laser removal operations
Fire/Explosion Risk
low
Toxic Gas Risk
low
Visibility Hazard
moderate
Required Personal Protective Equipment
Respiratory Protection
PAPR
Eye Protection
goggles
Skin Protection
gloves
Hazardous Fumes Generated
| Compound | Concentration | Exposure Limit | Hazard Class | Status |
|---|---|---|---|---|
| Silicon Dioxide (crystalline silica) | 5 mg/m³ | 0.025 mg/m³ | toxic | ⚠️ Exceeds Limit |
| Lead Oxide | 0.5 mg/m³ | 0.05 mg/m³ | toxic | ⚠️ Exceeds Limit |
| Metal Oxides (various) | 2 mg/m³ | 5 mg/m³ | irritant | ✓ Within Limit |
Ventilation Requirements
Air Changes Per Hour
12
Exhaust Velocity
0.5 m/s
Filtration Type
HEPA
Particulate Generation
Respirable Fraction
70%
Size Range
0.1 - 10 μm
Substrate Compatibility Warnings
- •Thermal shock may cause substrate damage or fragmentation
- •Incomplete removal may create respirable dust during cleanup
- •Potential for reflective surfaces to redirect laser energy

