Sanodye Red RLW (Red)
Red RLW is a uniform water-soluble dye suitable for aluminum anodizing adsorption dyeing, recommended for indoor use only.
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Red RLW is a uniform water-soluble dye suitable for aluminum anodizing adsorption dyeing, recommended for indoor use only.
1. Dye Technical Parameters
Appearance:Red granules
Composition:Non-metal azo dye complex
Density:700g/l
Solubility:At 20°C, 100g/l
Storage period:Can be stored indefinitely in sealed original packaging
Safety data:See safety data sheet (MSDS) for details
2. Application Conditions
|
Concentration
|
Dyeing temperature
|
Dyeing time
|
|
|
Light color
|
0.05 - 0.2 g/l
|
25 - 60°C
|
10 - 20 min
|
|
Medium color
|
0.3 - 0.8 g/l
|
25 - 60°C
|
10 - 20 min
|
|
Dark color
|
1.0 - 5.0 g/l
|
25 - 60°C
|
20 - 30 min
|
Applicable pH:5.5±0.5
pH adjustment:It is recommended to add Anodal Dye Buffer to adjust to pH 5.6
Water quality requirements:Best to use deionized water
Sealing:Recommended to use Anodal® ASL
3. Bath Solution Preparation
When preparing the bath solution, it must be fully dissolved.
It is best to pre-dissolve in a separate container using five times the amount of dye in hot water (80-90°C). Then, stir the pre-dissolved stock solution into the dyeing bath.
4. Dye Lightfastness
Dark color (12 µm):7 (ISO 2135)
5. Instructions
- Unsealed dyeing can be removed with dilute nitric acid.
- This dye is very sensitive to aluminum and sulfate, so the workpiece must be thoroughly cleaned before dyeing after anodizing.
- The thickness of the anodic film dyed particularly deep red is recommended to be 15-20um.
6. Treatment of Waste Dyeing Solution
Waste dyeing solution can be treated with Anodal WT-1, and the following table lists the treatment methods for dyeing wastewater:
| Precipitation method |
FeCl3, 40%
(ml/gDyeing solution)
|
Alkaline etching solution
(ml/gDyeing solution)
|
Anodal WT-1
(ml/gDyeing solution)
|
Residual dye in filtrate
Dye
(
mg/l
)
|
| A |
2.0
|
- |
0.5
|
<0.2
|
| B |
2.0
|
- | 0.3 |
<0.1
|
| C | - |
2.0
|
0.5
|
<1
|
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