Ceramic Glaze Deposits contamination on surface before laser cleaning
Yi-Chun Lin
Yi-Chun LinPh.D.Taiwan
Laser Materials Processing
Published
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

CompoundConcentrationExposure LimitHazard ClassStatus
Silicon Dioxide (crystalline silica)5 mg/m³0.025 mg/m³toxic⚠️ Exceeds Limit
Lead Oxide0.5 mg/m³0.05 mg/m³toxic⚠️ Exceeds Limit
Metal Oxides (various)2 mg/m³5 mg/m³irritant✓ 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