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SANODURE FAST BRONZE L
Sanodure Fast Bronze L
Homogeneous, water soluble dyestuff for the adsorptive dyeing of anodised aluminium.
The main applications for Sanodure® Fast Bronze L are:
Only recommended for interior use.
1. Dye-specific Data
Commercial form: fine powder, yellow-brown
Chemical character: Azo-dyestuff, metal complex
Bulking volume : 500 g/l
Solubility in water: 100 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 - 0.5 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.
4. Lightfastness of the Dyeings
Lightfastness of dark dyeings (12 µm): Note 7-8 (ISO 2135).
5. Special remarks
- The dyestuff dyes very extensively.
- Unsealed dyeing can be stripped with diluted nitric acid (30 %) or sulfuric acid (0.5%).
- The dyebaths are sensitive to sulphate and aluminium; anodized objects should therefore be
rinsed thoroughly before dyeing.
- Water sealing lightens the dyeing slightly.
- 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® Fast Bronze L.
FeCl, 40 % Etching
Anodal® WT-1 Residual dye Residual Cu
ml/g dye 3lye Liquid in filtrate in filtrate
method ml/g dye ml/g dye mg/l mg/l
A 5,0 - 0,3 ~ 3 ~ 0.05
B 5,0 - 0,3 4 ~ 0.06
C - 5,0 0,6 ~ 5 ~ 0,1
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.