Crystal Size and Tone
All three references are based on the α-Fe₂O₃ (hematite) phase. The difference in their tones stems from crystal size and particle distribution. A small crystal size produces a lighter, more yellowish red, whereas large crystals yield a dark red with a bluish undertone.
Red 110
This is the reference with the smallest average particle size (≈0.1–0.2 μm). Its tone is bright and close to a slightly yellowish red. It is ideal for light-colour preferences in mortar and cement applications.
Red 120
With a medium particle size (≈0.2–0.4 μm), it provides a balanced red tone. It offers a versatile solution in concrete, paving stone, ceramic glaze and paint formulations. It is one of the most frequently chosen references in the Alba Pigment portfolio.
Red 130
With its large particle structure (≈0.4–0.8 μm), it produces a deep, dark red with a slight bluish undertone. It stands out in prefabricated façade panels, dark-base decorative applications and roof tile production.
The difference between Red 110 and 130 is not merely aesthetic; their hiding power performances also differ according to the target application matrix and lighting conditions.
Spectrophotometric Comparison
- 110: L* ≈ 38, a* ≈ +32, b* ≈ +22
- 120: L* ≈ 35, a* ≈ +30, b* ≈ +18
- 130: L* ≈ 32, a* ≈ +28, b* ≈ +14
Selection Guide
- For a bright, vivid red: 110
- For medium intensity and versatile use: 120
- For a dark, settled, blue-toned deep red: 130
Despite coming from the same manufacturer family, these three references have different characters. A sample-based comparison must always be carried out before field application.