Sanodye® Blue 2LW Granulated 
 

Sanodye® Blue 2LW Granulated is a homogeneous, water-soluble dye which is distinguished by 
outstanding fastness to light, weather and heat. 
 
Sanodye® Blue 2LW Granulated is suitable for interior and exterior architectural purposes.

1. Dye-specific data 
 
Commercial form : fine granules 
Shade : pale blue to navy 
Chemical character : anthraquinone dye, not metallized 
Bulking volume : 750 g/l 
Solubility in water : 5 g/l at 20°C 
Storage stability : virtually unlimited, store containers closed tightly 
Ecotoxicological data : see Safety Data Sheet. 
 
 
2. Application conditions 
 
ConcentrationDyeing temperature Dyeing time
Standard coating thickness (12 µm)0.05 - 3 g/l 25 - 60°C 10 - 20 min 
Sanodal coating thickness (25 µm) 3 g/l 25 - 35°C 45 - 60 min 
 
pH : 5.5 ± 0.5  
Buffer :  The dyebaths are preferably buffered with  
       5 g/l ammonium acetate  
 +    0.5 ml/l acetic acid for pH 5.6 
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 is preferably dissolved in hot water (80°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 
 
Sanodye® Blue 2LW Granulated 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 Sanodye® Blue 2LW 
Granulated. 
 
Precipitation FeCl40%  Etching lye
method , ml/g dye Anodal WT-1 Residual     Dye reduction 
3Liquid dye in        in % related    
ml/g dye ml/g dye the filtrate to conc. 
mg/l dyebath 
A 2.5 - 0.6 < 1 > 99.9 
B 2.5 - 0.6 < 1 > 99.9 
C - 2.5 1.0 ~ 4.5 ~ 99.8 
 
 
 
 
 
 
 
 
 
 
 
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.