Description
AluDye Black BK excel is a very stable dye in powder form for colouring thin anodised film. It gives fast striking neutral black shade on aluminium. It is highly recommended for exterior applications due to its outstanding light fastness, weathering and heat resistance. Due to high concentration of dye, the consumption is much lower than other black dyes resulting into lower cost of black anodizing of aluminium. AluDye Black BK Excel offers good levelling even at short immersion time.
| Physical appearance | Black to dark grey powder |
| Chemical description | metalized azo dyes |
| Light Fatness | 8+ |
| Weather fastness | Excellent |
| Heat Fastness | Excellent |
| Hardcoat | Compatible |
| RoHS | Compliant |
Chemical Properties
| Anodic coating thickness | 10 (minimum) – 25 microns. |
| pH Range | 5.5 – 6.5 |
| Dye bath temperature | 60° ± 2° C |
| Immersion time | 5 – 15 min. for normal applications |
| Preferred sealing | Hobbychemical Hot sealant |
RECOMMENDED APPLICATION CONDITIONS
Concentration, dyeing temperature and time
10 g/l is the required concentration to ensure a jet black external weather resistant colour
| Colour; | Concentration | Dyeing temperature | Dyeing time |
| AluDye Black BK excel | dilute as per instruction, ensure pH is maintained at 6.0 +/- 0.5 | 60 °C | 5-15 min
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