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Product
SANODYE BLACK OA
Sanodye Black OA
Homogeneous, metal free, water-soluble dye for the dyeing of anodized aluminium.
Sanodye® Schwarz OA is distinguished by its high fastness to light and heat as well as by its strong
dyeing power.
Clariant (Switzerland) Ltd.
Sanodye® Black OA
16.09.2008 1 102782
1. Dye-specific data
Commercial form: fine granules
Chemical character: azo dye, not metallized
Bulking volume: 850 g/l
Solubility in water: 20 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
Standard coating thickness (12 µm) 10 g/l 55 - 60°C 10 - 20 min
Standard coating thickness (25 µm) 10 g/l 55 - 60°C 30 - 45 min
pH: 5.5 ± 0,5
Buffer: The dyebaths have to be buffered with
8 g/l sodium acetate trihydrate
+ 0,4 ml/l acetic acid, 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 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
Sanodye® Black OA is distinguished by high lightfastness.
Lightfastness of Sanodal® dyeings: rating > 8 (ISO 2135).
Clariant (Switzerland) Ltd. Sanodye
® Black OA
16.09.2008 2 102782
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.
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® Black OA.
Anodal WT-1 Residual Dye reduction
Precipitation
method FeClml/g dye 3, 40% Etching lyeml/g dye Liquid dye in in % related
ml/g dye the filtrate to conc.
mg/l dyebath
A 2.0 - 0.7 ~ 1 > 99.9
B 2.0 - 0.7 ~ 400 ~ 96
C - 2.0 0,8 ~ 3400 ~ 66
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.
Clariant (Switzerland) Ltd.
Sanodye® Black OA
16.09.2008 3