Coloring Tiles

The advantages of iron oxide pigments
Ultra-long outdoor lifespan (15–30 years)

Lightfastness rating of 7–8, with a ΔE < 1.5 after 2000 hours of QUV aging.
Strongly alkaline environment (cement pH ≈ 12.5)    

Chemically inert, it does not react with Ca(OH)₂.
Freeze-thaw cycle resistance

The pigment particles are very fine (0.1–0.7 μm) and do not damage the substrate structure.
Color stability 

No migration, no color bleeding, the color remains as good as new for 10 years.
Alkali resistance

No discoloration occurred after soaking in a saturated Ca(OH)₂ solution for 30 days. 
Environmental protection and safety 

Free of heavy metals and organic solvents, complying with GB/T 25821 green building materials standard.