Sanodal® Black 2LW 
 
 
 
 
Sanodal® Black 2LW is a homogeneous, water-soluble dye which is distinguished by high fastness to 
light, weather and heat.  
 
 
Sanodal® Black 2LW is suitable for interior and exterior architectural purposes.  

 
1. Dye-specific data 
 
 Commercial form: fine granules 
 Shade: bluish black; 
  at low concentrations bluish grey shades 
 Chemical character: azo dye, heavy metal complex 
 Bulking volume: 800 g/l 
 Solubility in water: 50 g/l at 20°C 
 Storage stability: virtually unlimited, store containers closed tightly  
 Ecotoxicological data: see Safety Data Sheet. 
 
 
2. Application conditions 
  
  
 Concentration 
temperature Dyeing Dyeing time 
Grey shades 
Standard coating thickness  (12 µm) 0,1 – 10 g/l 25 – 60°C 10 – 20 min 
Black dyeings 
Standard coating thickness  (12 µm) 10 g/l 55 – 60°C 15 – 20 min 
Sanodal layers  (25µm) 10 g/l 55 – 60°C 30 – 40 min 
 
 pH: 4,4 ± 0,4 
 Water quality: preferably deionized 
 Sealing: preferably with Anodal® ASL (one or two stage). 
 
 
3. Preparation of the dyebath 
 
When preparing the dyebath care must be taken that the dye is well dissolved. The dye can be 
dissolved in deionized water (80 – 90°C) in a separate container (5 parts water to 1 part dye). 
This stock solution is then stirred into the dyebath.  
 
 
4. Lightfastness of the dyeings 
 
 Sanodal® Black 2LW is distinguished by outstanding lightfastness. 
 Lightfastness of Sanodal® dyeings: rating > 9 (ISO 2135). 

5. Special remarks 
 
 -  Unsealed dyeing can be stripped with nitric acid. 
 
 -  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 must be disposed of; e.g. with Anodal® WT-1 Liquid. The precipitation method 
is described in detail in the Technical Information bulletin for Anodal® WT-1 Liquid. 
 
 The table below shows the additions required for precipitating Sanodal® Black 2LW. 
 
Anodal WT-1 Residual Chrome 
Precipitation FeCl3 40 % Etching lye 
method ml/g dye ml/g dye ml/g dye Liquid  dye in     content in the filtrate  the filtrate 
mg/l mg/l 
A 1,8 - 0,8 < 1 < 0,05 
B 1,8 - 0,8 < 1 < 0,05  
C - 1,8 0,8 < 1 < 0,05 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Many of their dyestuffs, pigments and chemicals are patented by Clariant Ltd. or ist affiliates in numerous industrial countries. 
® Trademark registered by Clariant Ltd or Clariant GmbH in numerous countries. 
* Trademark licensed  to Clariant Ltd in numerous countries. 
+ Manufacter’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.