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SANODYE BROWN R
Sanodye® Brown R
Homogeneous, water soluble dyestuff for the adsorptive dyeing of anodised aluminium.
Sanodye® Brown R is notable for its interesting reddish brown shade and its technical reliability in
Only recommended for interior use.
1. Dye-specific Data
Commercial form: fine granules
Chemical character: Azo-dyestuff, unmetallized
Density: 550 g/l
Solubility in water: 300 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 0.05 - 0.2 g/l 25 - 60°C 10 - 20 min
Medium shades 0.3 - 0.8 g/l 25 - 60°C 10 - 20 min
Dark shades 1.0 - 3.0 g/l 25 - 60°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.
5. Special remarks
- Unsealed dyeings are virtually unstrippable in diluted nitric or sulphuric acid.
They can be stripped in nitric acid 10 % + potassium permanganate 5 %.
After the treatment in Potassium permanganate, neutralization must be carried out for 1-5 min
in a sodium bisulphite 5 % solution.
- The dyebaths are sensitive to aluminium; anodized objects should therefore be
rinsed thoroughly before dyeing.
- Shading :
Sanodye® Brown R can be used not only as a straight colour for red-brown tones but also as
an interesting combination element, e.g. together with Sanodye® Golden Orange RLW for
- 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 Sanodye® Brown R.
Precipitation FeCl3, 40 % Etching Anodal
® WT-1 Residual dye Residual Cu in filtrate in filtrate
lye Liquid ml/g dye
ml/g dye ml/g dye mg/l mg/l
A 5,0 - 0,8 12 0,3
B 5,0 - 0,8 7 0,2
C - 5,0 1,5 10 0,2
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.
4. Lightfastness of the Dyeings
Lightfastness of dark dyeings (12 µm): Note 5-6 (ISO 2135).