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Darkener Solution for Black Ruthenium

Product information "Darkener Solution for Black Ruthenium"

Blackening Additive for Black Rhodium / Ruthenium BMG-090.2M

Additive for intensifying dark ruthenium and black rhodium electroplated finishes


Short Description

The Blackening Additive BMG-090.2M is a specialized chemical additive designed for use in ruthenium or black rhodium electroplating baths to enhance and deepen the dark color tone of the deposited metal layer.
By adding this additive in controlled amounts, the coating achieves a deeper, more uniform black or dark anthracite appearance, ideal for decorative applications, modern design surfaces, and high-contrast multilayer plating systems.


Applications

This blackening additive is used for:

  • Deepening the black or dark gray color of ruthenium and black rhodium coatings

  • Fine color adjustment of dark electroplated finishes

  • Improving uniformity and depth of the deposited layer

  • Creating intense decorative effects on jewelry and accessories

  • Use in tank, brush, and pen/plug plating

It allows precise control of the final color without changing the base electrolyte.


How the Blackening Additive Works (Simple Explanation)

Ruthenium and black rhodium baths produce coatings whose final color depends on bath chemistry and operating parameters. The blackening additive modifies the electrochemical deposition process when added in defined quantities, resulting in a darker and more intense metal finish:

  1. Prepare the base bath: Operate the ruthenium or black rhodium electrolyte according to specifications.

  2. Add the blackening additive: Introduce the additive at the recommended dosage.

  3. Electroplating: Plate as usual; the deposited layer appears darker and more uniform.

  4. Fine adjustment: The final shade can be precisely adjusted by dosage and process settings.


Advantages of Blackening Additive BMG-090.2M

  • Intense black and anthracite color tones

  • Improved visual uniformity of dark coatings

  • Enables precise color tuning

  • Compatible with existing ruthenium and black rhodium electrolytes

  • Suitable for tank, brush, and pen plating

  • Easy integration into existing plating processes


Technical Parameters

PropertyValue / Range
Product typeBlackening additive
Intended useRuthenium and black rhodium electrolytes
FunctionColor depth and intensity enhancement
Application methodAdded directly to plating bath
CompatibilityTank, brush, and pen/plug plating
Color effectDeeper black / dark anthracite
DosageProcess- and bath-dependent
StorageCool, dry, tightly closed
Safety classificationChemical additive – handle with care

Note: Optimal dosage depends on bath chemistry, temperature, and desired color depth. Preliminary testing is recommended.


Application Notes

  • Add the blackening additive gradually while ensuring proper bath agitation.

  • Perform test runs to determine the ideal concentration for the desired shade.

  • Avoid overdosing, as this may affect coating uniformity.

  • Maintain stable plating parameters for consistent results.


Safety Information

Blackening additives contain active chemical substances and must be handled with care:

  • Wear protective gloves, safety goggles, and suitable clothing

  • Avoid skin and eye contact

  • Rinse immediately with water in case of contact

  • Use only in well-ventilated areas

  • Do not ingest; keep out of reach of children

  • Dispose of according to local chemical waste regulations


Conclusion

The Blackening Additive for Black Rhodium / Ruthenium BMG-090.2M is an effective solution for intensifying dark electroplated finishes.
It allows precise control over black and anthracite tones while maintaining the original plating process. Ideal for jewelry, accessories, and decorative design surfaces, this additive delivers deeper, more uniform colors and enhances the overall visual quality of black rhodium and ruthenium coatings.

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