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SANODAL BLACK GL PASTE
Sanodal® Black GL Paste
Sanodal® Black GL Paste is a homogeneous, water-soluble dye which is distinguished by high
fastness to light and weather.
Sanodal® Black GL Paste is suitable for interior and exterior architectural purposes.
1. Dye-specific data
Shade: greenish black;
at low concentrations bottle green shades
Appearance: black paste
Chemical character: homogeneous azo metal complex dye
Density (20°C): 1150 g/l
Solubility in water: miscible
Storage stability: at least 1 year in closed containers between 0°C
Ecotoxicological data: see Safety Data Sheet.
2. Application conditions
temperature Dyeing Dyeing time
Bottle green shades
Standard layers (12µm) 0.1 - 10 g/l 25 - 60°C 10 - 20 min
Standard layers (12 μm) 30 g/l 55 - 60°C 15 - 20 min
Sanodal layers (25 μm) 30 g/l 55 - 60°C 30 - 40 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, pH 5.6
Water quality: preferably deionized; dyeing is also possible in tapwater, but
this can reduce the service life of the bath
Sealing: preferably with Anodal® ASL (one or two stage).
3. Setting the dyebath
Before using, the content of the barrel has to be stirred in order to homogenize the paste.
When preparing the dyebath care must be taken that the dye is well dissolved. The dye can be
dissolved in deionized water 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 GL Paste is distinguished by outstanding lightfastness.
Lightfastness of Sanodal® dyeings: rating > 9 (ISO 2135).
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 sulphate and aluminium; anodized objects should therefore be
rinsed thoroughly before dyeing.
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 GL Paste.
Precipitation FeCl3, 40 % Etching lye Anodal WT-1
method ml/g dye ml/g dye ml/g dye
Liquid dye in content in the filtrate the filtrate
A 1.0 - 0.4 < 1 < 0.2
B 1.0 - 0.4 ~ 60 < 1.0
C - 0.5 0.8 ~ 30 < 1.0
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.