Black Dye BK Excel Small

Black Dye, Speciality Black BK Excel Small Part Number: DYEBLK8
Price: $59.95


Black Dye, Speciality Black BK Excel Small
Part Number: DYEBLK8

This Packet of Dye contains 96 gms of dye and will make 8 litres of dyeing solution

Specialty Black BK Excel is a multi-component, water soluble dye, used to color anodized aluminum jet-black.

Extremely economical when compared to other high light fastness black dyes.

Only requires 0.40 mil coating thickness to achieve consistent jet-black coatings.

Excellent light fastness  

Fast striking

Hardcoat compatible

RoHS compliant


Application instructions

pH: 6.0 ±0.5 Buffering: Not required

Temperature:  60°C -+2 deg

Coating thickness: 0.40 mils. or greater  

Dye time: 5-15 minutes 

Preferred sealing: Caswell Australia Sealant


Conditions for using Specialty Black BK Excel

Tank: Stainless steel or other acid resistant materials such as neoprene, polyethylene and polypropylene that can withstand a constant operating temperature of 60°C.

Water quality: Deionized

pH adjustments: Raise with sodium hydroxide. Lower with acetic acid. The pH should be checked once per shift with a calibrated meter and maintained within recommended range.

Bath agitation: Moderate agitation must be used for high uniformity of color.

Rinsing: It is important to remove all acid residues clinging to the work and acid retention in the oxide pore itself. Rinse work load thoroughly after anodizing. A minimum of two rinses is recommended, with the second rinse at over-flow. To increase rinsing effectiveness, add vigorous air agitation in all rinse tanks. This also improves your rinsing of surfaces on complicated shaped parts. 

Light fastness

Rating: 8 (1=poor, 8=excellent)

Preparation of a new dyebath

1. A cleaned tank is filled with deionized water to about 75% of final volume and raised to dyeing temperature.

2. The required amount of dye is weighed out and dissolved in hot deionized water (70°-82°C) in a separate container until a slurry is formed. This is your stock solution.

3. With agitation turned on in tank, pour stock solution into tank.

4. Top off the tank to final working solution volume with more hot deionized water and agitate for 15 minutes.

5. Using a calibrated pH meter, check the pH and adjust if necessary.

6. The dyebath is brought to dyeing temperature, 60°C ±2°C.


The MSDS for this product can be found by scrolling down this page, 


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