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SANODURE BROWN GSL
Sanodure® Brown GSL
Homogeneous, water soluble dyestuff for the adsorptive dyeing of anodised aluminium.
Only recommended for interior use.
Clariant (Switzerland) Ltd Sanodure® Brown GSL
15. 09. 2008 1 102216
1. Dye-specific Data
Commercial form: fine granules
Chemical character: Azo-dyestuff, heavy metal complex
Density: 800 g/l
Solubility in water: 10 g/l at 20°C
Storage stability: practically unlimited, in closed original containers
Ecotoxicological data: see safety data sheet.
2. Application conditions
Concentration, dyeing temperature and time
Concentration Dyeing temperature Dyeing time
Bright shades 0.1 - 0.3 g/l 20 - 30°C 10 - 20 min
Medium shades 0.5 - 1.0 g/l 20 - 30°C 10 - 20 min
Dark shades 2.0 - 5.0 g/l 20 - 30°C 20 - 30 min
pH: 5,5 ± 0,5
Buffer: The dyebaths are preferably buffered with
8 g/l sodium acetate trihydrate
+ 0,4 ml/l acetic acid for pH 5.6
Water quality: preferably deionized
Sealing: preferably with Anodal® ASL (one or two stage).
3. Setting the Dyebath
When setting the dyebath, care must be taken that the dyestuff is well dissolved. Dissolve the
dye preferably with hot water (80°C) in a separate container (approx. 5 parts water to 1 part
dye). Then this mother solution will be added to the dyebath while stirring.
4. Lightfastness of the Dyeings
Lightfastness of dark dyeings (12 µm): Note 6-7 (ISO 2135).
Clariant (Switzerland) Ltd Sanodure® Brown GSL
15. 09. 2008 2 102216
5. Special remarks
- Deionized water should be used to set the bath.
- Unsealed dyeing can be stripped with diluted nitric acid (30 %).
The best results concerning stripping will be achieved with nitrical acid 10 % + potassium
permanganate 5 %.
- The dyebaths are sensitive to aluminium; anodized objects should therefore be rinsed
thoroughly before dyeing.
- Prevention of mould formation :
An addition of an antimicrobial product can inhibit mould formation for a long time.
We recommend the addition of Nipacide CI 15 (See Technical Information) 25 – 50 mg/l.
6. Disposal of the dyebaths
Spent dyebaths can be readily precipitated with Anodal® WT-1 Liquid. The method is
described in detail in the Technical Information bulletin for Anodal® WT-1 Liquid.
The table below shows the additions required for precipitating Sanodure® Brown GSL.
Precipitation FeCl3, 40 % Etching Anodal
® WT-1 Residual dye Residual Ni
method ml/g dye lye
Liquid in filtrate in filtrate
ml/g dye ml/g dye mg/l mg/l
A 2,0 - 0,2 < 1 < 0,05
B 3,0 - 0,3 < 1 < 0,05
C - 4,0 0,3 < 1 < 0,05
Many of their dyestuffs, pigments and chemicals are patented by Clariant in numerous industrial countries.
® Trademark of Clariant registered in numerous countries.
®* Trademark registered in numerous countries and licensed to Clariant.
®+ Other Manufacturer's registered trade mark
The signs ®, ®* and ®+ appear only at the first mention of the product.
The information and recommendations presented here were compiled with the utmost care, but cannot be extended to cover
every possible case. They are intended to serve as non-binding guidelines and must be adapted to the prevailing conditions.