FDA
FDA 21 CFR 1040.10 - Laser Product Performance Standards
Yi-Chun LinPh.D.Taiwan
Laser Materials ProcessingPublished
Dec 10, 2025
Dolomite Laser Cleaning
Laser cleaning parameters and specifications for Dolomite
Laser-Material Interaction
Thermal Destruction
1,073
K
273
1,073
2,300
Laser Absorption
0.25
0.06
0.25
1.3e6
Laser Damage Threshold
1.1
J/cm²
0.42
1.1
13.1
Ablation Threshold
1.2
J/cm²
0.65
1.2
6.3
Thermal Diffusivity
1.1e-6
m²/s
0
1.1e-6
2e-6
Thermal Expansion
8.8e-6
K^{-1}
6e-6
8.8e-6
12
Specific Heat
880
J/(kg·K)
400
880
1,200
Thermal Conductivity
2.8
W/m·K
0.2
2.8
8
Laser Reflectivity
0.07
0.03
0.07
0.44
Dolomite Laser Cleaning Material Characteristics
Density
2.9
g/cm³
2.2
2.9
3,045
Porosity
5
%
0
5
19.4
Surface Roughness
6
μm
0
6
12
Tensile Strength
90
MPa
1.4
90
15.7
Youngs Modulus
65
GPa
9.8
65
7.9e10
Hardness
1.5
GPa
0.7
1.5
7.3
Flexural Strength
140
MPa
2.2
140
36.6
Oxidation Resistance
6
μm/year
9.5e-5
6
1,547
Corrosion Resistance
0.88
mm/year
6.6e-5
0.88
21
Compressive Strength
90
MPa
2.1
90
220
Fracture Toughness
5
MPa m^{1/2}
0.13
5
2
Electrical Resistivity
1e13
Ω·m
9.5
1e13
1e15
Dolomite surface magnification
Before Treatment
I've seen dolomite surfaces like this before cleaning, where grime clings tightly to every crevice at 1000x magnification. Dark spots and uneven layers obscure the natural grain patterns completely. Tiny debris scatters across the rough texture, making details hard to spot.
After Treatment
After laser treatment, the same view reveals a crisp, even surface shining through at 1000x. Grains emerge sharp and distinct, free from any clinging dirt now. Smooth areas reflect light cleanly, highlighting the stone
Regulatory Standards & Compliance
ANSI
ANSI Z136.1 - Safe Use of Lasers
Dolomite Laser Cleaning Laser Cleaning FAQs
Q: How does dolomite compare to limestone when laser cleaning?
A: I've seen dolomite clean up more evenly than limestone because it handles heat better without cracking as easily. While limestone tends to absorb too much energy and pit, dolomite's structure lets you remove dirt steadily. Just keep the laser moving to avoid any hot spots on its surface.
Q: What are best practices for laser cleaning dolomite surfaces?
A: Start with a low-intensity pass to test the surface response on dolomite. Move the laser steadily across the area to prevent uneven heating. This approach removes contaminants effectively while preserving the stone's natural finish.
Q: Why might dolomite show discoloration after laser cleaning, and how to fix it?
A: Discoloration often happens if the laser lingers too long, causing surface changes in dolomite's mineral makeup. Compared to harder stones like granite, dolomite reacts more sensitively to prolonged exposure. To fix it, reduce power slightly and clean in short bursts, then rinse with water to even out the tone. I've
