Sanodal Deep Black MLW (Deep Black)
Deep black MLW dye has been released for many years and has become the industry quality standard for the finishing of aluminum products, especially outdoor aluminum building materials.
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Product Details
Deep black MLW particles are derived from deep black MLW powder, and this technical information is also applicable to deep black MLW powder products.
1. Advantages of particle dyes
- Not easy to agglomerate
- No dust
Deep black MLW dye has been issued for many years and has been used as an industry quality standard in the usual aluminum product finishing, especially in outdoor aluminum building materials.
2. Deep black MLW is mainly used for the following two aspects of black dyeing:
- Outdoor aluminum materials with high weather resistance requirements
- Other black products with high quality requirements
3. Dye technical parameters
Appearance:Fine particles
Composition:Heavy metal complex azo dye
Density:Approximately 800g/l
Solubility:20°C, approximately 50g/l
Shelf life:10 years
Safety data:See safety data sheet (MSDS) for details
4. Application conditions
|
Concentration
|
Dyeing temperature
|
Dyeing time
|
pH
|
|
|
Standard film thickness (12μm)
|
0.1-10 g/l
|
25 - 60℃
|
10 - 20 min
|
4.5
|
|
SanodalFilm thickness (25μm)
|
30 g/l
|
55 - 60℃
|
15 - 20 min
|
4.5
|
5. Preparation of bath solution
It is recommended to dissolve the dye in deionized water. Tap water can also be used, but it will reduce the stability of the bath solution.
When preparing the bath solution, it must be fully dissolved.
It is best to pre-dissolve in hot water (80-90°C) at a ratio of 5 times the dye in a separate container. Then, stir the pre-dissolved mother liquor into the dyeing bath.
To optimize the dyeing performance, boil the bath solution for a period of time (about 1 minute) before dyeing, or maintain the bath solution temperature at 60 °C for 4-5 hours.
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 waste liquid:
| Precipitation method |
FeCl3, 40 %
(Dye)ml/gAlkali etching solution
|
Dye
(Dye)ml/gAnodal WT-1
Filtrate residual dye
|
0.8
(Dye)ml/gAlkali etching solution
|
<
~ 1.5
(Dye)
mg/l
）
|
| A |
1.8
|
- |
0,8
|
〈1
|
| B |
1.8
|
- |
0.8
|
〈1
|
| C | - |
1.8
|
0,8
|
~ 1.5
|
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