Contents
- Introduction
- Analytical Grade Purity in Electroplating Salts
- Analytical Grade Copper Sulfate
- Analytical Grade Nickel Chloride
- Analytical Grade Nickel Sulfate
- Analytical Grade Zinc Chloride
- Analytical Grade Potassium Cyanide
- Quality Control and Traceability
- Conclusion
Introduction
Electrodeposition is the heart of the electroplating process. This is the stage where metals (copper, nickel, zinc, gold, silver) are deposited onto the substrate, creating the coating that defines the quality, durability and final appearance of the piece.
In electroplating of jewelry, fashion jewelry (gold-plated jewelry) and costume jewelry, the quality of the analytical grade (P.A.) salts used in the electrolytic baths directly determines:
✅ Deposit uniformity ✅ Coating adhesion ✅ Brightness and final appearance ✅ Durability of the piece ✅ Process reproducibility
Analytical Grade Purity in Electroplating Salts
What Defines an Analytical Grade Salt?
Analytical grade (P.A.) salts are chemical reagents produced under strict quality control, with:
- Minimum purity: 99% (some products reach 99.5%)
- Impurity control: Full analysis of contaminants
- Lot certification: Every lot analyzed individually
- Full traceability: Complete production and origin history
Why Is Purity Critical?
In electrolytic baths, impurities of just 0.01% can cause:
❌ Uneven deposits (stains, gaps) ❌ Loss of brightness and appearance ❌ Reduced adhesion (peeling) ❌ Premature corrosion ❌ Cross-contamination between baths
Solution: Use only certified analytical grade salts with a full impurity analysis.
Analytical Grade Copper Sulfate
Technical Specifications
Chemical formula: CuSO₄·5H₂O Purity: 99.5% minimum Appearance: Bright blue crystals
Control of critical impurities:
- Chlorides (Cl⁻): < 0.005% (very low content)
- Iron (Fe): < 0.001%
- Nickel (Ni): < 0.002%
- Zinc (Zn): < 0.002%
Applications
✓ Acid copper baths
- Base layer for electrodeposition of precious metals
- Surface leveling
- Part reclamation
✓ Alkaline copper baths
- Deposition on sensitive substrates
- Tin plating processes
Why Is Analytical Grade Critical?
The very low chloride content (< 0.005%) ensures:
- Uniform deposits without pitting
- A smooth, bright surface
- No premature corrosion
- Compatibility with organic additives
Mandatory certification:
- Unique lot number
- Lot-specific Certificate of Analysis
- Up-to-date SDS (ABNT NBR 14725, the Brazilian standard for safety data sheets and hazard communication)
Analytical Grade Nickel Chloride
Technical Specifications
Chemical formula: NiCl₂·6H₂O Purity: Specific electroplating grade Appearance: Bright green crystals
What sets electroplating grade apart:
- Complete solubility with no residue
- No sulfates that interfere with the bath
- Low heavy metal content
- Compatibility with organic additives
Applications
✓ Bright nickel baths
- Decorative and functional coating
- Intermediate layer before chrome plating
- Corrosion protection
✓ Watts baths
- The classic nickel plating process
- Versatile applications
- Easier pH control
Why Purity Matters
Analytical grade nickel chloride ensures:
- Complete solubility (no residue to contaminate the bath)
- Uniform deposits even on complex geometries
- Compatibility with additives (brighteners, levelers)
- Process reproducibility
Analytical Grade Nickel Sulfate
Technical Specifications
Chemical formula: NiSO₄·6H₂O Purity: 99% minimum Appearance: Light green crystals
Advantages over the chloride:
- Easier pH control (more stable baths)
- Stability in long processes
- Less aggressive to the substrate
- Full impurity analysis
Applications
✓ Matte nickel baths
- Non-reflective finish
- Protective anticorrosion layer
- Base for chrome plating
✓ Mixed baths (Watts)
- Combined with nickel chloride
- Control of deposit properties
- Versatile applications
Certification
Mandatory documentation:
- Test reports for every lot
- Cobalt analysis (Co < 0.01%)
- Iron analysis (Fe < 0.001%)
- Copper analysis (Cu < 0.002%)
Analytical Grade Zinc Chloride
Technical Specifications
Chemical formula: ZnCl₂ Purity: 98% minimum (analytical grade) Appearance: White crystals or granules
Quality control:
- Verified analytical purity
- Certificates of origin
- Low heavy metal content
- Controlled solubility
Applications
✓ Acid zinc baths
- Corrosion protection of the base metal
- Zinc plating of metal components
- Protective layer on costume jewelry
✓ Special processes
- Zinc-nickel (superior protection)
- Zinc-cobalt (corrosion resistance)
Why Certification Matters
Analytical grade zinc chloride ensures:
- Efficient corrosion protection
- Uniform deposits without gaps
- Superior adhesion to the substrate
- Compliance with environmental standards
Analytical Grade Potassium Cyanide
Technical Specifications
Chemical formula: KCN Purity: 96% minimum (technical grade) Appearance: White or crystalline solid
⚠️ CONTROLLED PRODUCT Subject to special control under current legislation
Applications
✓ Gold and silver electrodeposition
- Gold baths (gold plating)
- Silver baths (silver plating)
- Precious metal recovery processes
✓ Certified purity allows precise control
- Essential for precious metal traceability
- Allows the electroplating shop to calculate deposition accurately
- Supports auditing and accountability
Safety and Documentation
Complete safety documentation:
- Detailed SDS with emergency procedures
- Certificate of Analysis for every lot
- Safe storage instructions
- Disposal procedures in accordance with the law
Storage and transport:
- Compliance with current legislation
- Transport by an authorized carrier
- Storage in a secure, signposted area
- Access restricted to trained personnel
Mandatory PPE:
- Nitrile or PVC gloves
- Chemical splash goggles
- Respirator
- Impermeable apron
Quality Control and Traceability
Complete Documentation for Every Lot
Boreto & Cardoso®, with 53 years of experience in the chemical market (since 1972), provides complete technical documentation for all its analytical grade salts:
📋 Detailed test reports
- Complete physical and chemical specifications
- Verified quality parameters
- Full impurity analysis
📊 Certificates of Analysis for every lot
- Specific analyses for each lot produced
- Full product traceability
- Production and origin history
⚠️ Up-to-date SDS (ABNT NBR 14725)
- Safety Data Sheet in accordance with the standard
- Mandatory annual update
- Emergency procedures
📦 Full traceability
- Unique lot number on every package
- Complete origin and transport history
- Complete tax documentation
ISO 9001:2015 and Quality Assurance
Suppliers certified to ISO 9001:2015 ensure:
✅ Standardized production processes ✅ Complete physical and chemical analyses ✅ Audited quality management ✅ Rigorous quality control
Conclusion
The quality of analytical grade salts for electrodeposition directly determines the final result of electroplating jewelry, fashion jewelry and costume jewelry.
Boreto & Cardoso®'s full range of analytical grade salts:
⚡ Analytical Grade Copper Sulfate: 99.5% purity, very low chloride content ⚡ Analytical Grade Nickel Chloride: Electroplating grade, complete solubility ⚡ Analytical Grade Nickel Sulfate: Easier pH control, guaranteed stability ⚡ Analytical Grade Zinc Chloride: Corrosion protection, verified purity ⚡ Analytical Grade Potassium Cyanide: Gold and silver electrodeposition, complete documentation
Why Boreto & Cardoso®:
✅ 53 years of experience in the chemical market (since 1972) ✅ Full traceability with certificates for every lot ✅ Complete SDS and test reports ✅ ISO 9001:2015 certified suppliers
Request a No-Obligation Quote
Get in touch to request:
- A detailed quote for specific products
- Technical information on applications
- Certificates of Analysis and documentation
- Special terms for regular purchases
Contact channels:
📞 (11) 3931-1722 | (11) 2366-6260 📱 WhatsApp: (11) 93931-1722 | (11) 98366-6260 📧 boreto@boreto.com.br
Addresses:
📍 Headquarters: R. Alagoas, 30 - Santana de Parnaíba - SP 📍 Branch: R. Aratibá, 759 - Limeira - SP
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BORETO & CARDOSO® Chemical Inputs Distributor since 1972 ISO 9001:2015 | Full Traceability
Note to the Reader This article brings together technical information drawn from various sources, with the aim of broadening knowledge about the raw materials mentioned. It is for information purposes only and does not represent any indication of application, formulation or direct recommendation of use on the part of Boreto & Cardoso. With 53 years of experience, Boreto & Cardoso® operates strictly as a supplier of chemical inputs for a wide range of applications, and it is the responsibility of each user to verify the suitability and compliance of their application.