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Sanodure Bronze G (Antique Copper)

Copper G is a uniform water-soluble dye suitable for aluminum anodizing adsorption dyeing, and this dye is only recommended for indoor use.

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Copper G is a uniform water-soluble dye suitable for aluminum anodizing adsorption dyeing, and this dye is only recommended for indoor use.
1. Dye Technical Parameters
Appearance:Granular, black-brown
Composition:Metal complex azo dye
Density:1000g/l
Solubility:At 20°C, 15g/l
Storage period:Under sealed original packaging, it can actually be stored permanently.
Safety data:See the Safety Data Sheet (MSDS)
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 - 3.0 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 requirements: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 5 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):6-7 (ISO 2135).

5. Instructions

  • Undeclared dyeing can be removed with 30% diluted nitric acid. The best removal method is with 10% diluted nitric acid + 5% potassium permanganate.
  • This dye is sensitive to aluminum, so workpieces that have been anodized must be thoroughly cleaned before dyeing.
  • Sealing will lighten the color, while sealing salt ASL will produce a brownish copper color.
  • If the dye solution sits too long, it may change color, so it should be boiled regularly.

6. Disposal of Waste Dye Solution
Waste dye solution can be precipitated using Anodal WT-1 Liquid. The table below lists other substances required for processing Copper G:

Precipitation method
FeCl3, 40%
( ml/g Dye)
Alkaline etching solution
( ml/g Dye)
Anodal WT-1
( ml/g Dye)
Filtrate residue Dye
( mg/l )
Filtrate residue Fe
( mg/l )
A
2.0 
-
0.6 
< 0.5 
~ 0.2
B
2.0 
-
0.6 
< 0.5 
< 0.05 
C -
2.0 
0.6 
< 0.5 
< 0.05 

 

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