The quality of chemical inputs directly determines the success of the whole electroplating process. In a sector where precise control is fundamental and every bath represents a significant investment in precious metals, choosing the wrong acids, alkalis, salts and oxidizers can completely compromise the operation.
Boreto & Cardoso®, a specialized distributor with 53 years of experience since 1972, serves the Brazilian market with a complete portfolio of chemical inputs. This guide presents professional technical criteria for choosing suppliers and products strategically.
Executive Summary
- Choosing the wrong inputs is a frequent cause of quality problems
- 13 essential products make up a complete portfolio for jewelry electroplating shops
- The right concentration of acid and alkaline inputs is a fundamental criterion
- Complete documentation (SDS + Certificates) is mandatory for compliance
- Suppliers with quality control ensure consistency
- Full traceability prevents problems in audits
Why Choosing Inputs Is Critical
The Foundation of Quality
In electroplating, every stage depends on the quality of the inputs. Unsuitable acids compromise adhesion. Contaminated alkalis leave residues. Impure salts produce uneven deposits.
The Impact on Processes
Surface Preparation: Pickling with acids of suitable purity removes oxides evenly. Degreasing with the right alkalis eliminates contamination. Chemical activation prepares the surface for perfect adhesion.
Electroplating Baths: High-purity salts ensure uniform deposition. Acids used as electrolytes keep baths stable. Consistency between batches ensures reproducibility.
Finishing: Technical lacquers protect the pieces. Oxidizers allow efficient wastewater treatment. Certified products make environmental compliance easier.
The 13 Essential Products
Boreto & Cardoso® serves electroplating shops with 13 essential products, sourced from renowned brands.
Category 1: Acids
1. Hydrochloric Acid
Application: Pickling and activation of metal surfaces.
Specifications:
- Concentration: 32% (±0.5%)
- Appearance: Colorless / slightly yellowish liquid
Why purity matters: Impurities are incorporated into the surface and cause stains in precious metal baths. Lower purity compromises the final quality.
Visual check: Hydrochloric acid ranges in tone from colorless to slightly yellowish
2. Nitric Acid
Application: Selective pickling, stainless steel cleaning, passivation.
Specifications:
- Concentration: 53%
- Chloride content: Maximum 0.003%
- Color: Colorless to slightly yellowish
Specific applications: Silver cleaning, stainless steel pickling, preparation for rhodium baths.
3. Sulfuric Acid
Application: Electrolyte in baths, acid activation, solution preparation.
Specifications:
- Concentration: 98%
- Organic matter: None
- Heavy metals: Minimal
Key point: A direct component of baths. Purity affects bath life and stability.
Category 2: Alkalis
4. Caustic Soda Flakes
Application: Alkaline degreasing, tank cleaning, pH adjustment.
Specifications:
- Purity: Minimum 97% NaOH
- Carbonate content: Maximum 1%
- Particle size: Uniform
- Moisture: Maximum 0.5%
Why it matters: Purity ensures efficient removal without residues that compromise later stages.
5. Caustic Soda Solution
Application: Automated systems, quick adjustments, precise dosing.
Specifications:
- Concentration: 49% (±1%)
- Base purity: Minimum 97% NaOH
- Stability: 12 months
Advantage: No dissolving needed, fewer errors, easier automation.
Category 3: Inorganic Salts
6. Light Soda Ash
Application: Fine pH adjustment, mild alkaline cleaning.
Specifications:
- Purity: Minimum 99% Na₂CO₃
- Particle size: 200-400 mesh
- Alkalinity: Consistent
7. Barium Chloride
Application: Sulfate precipitation, purification, analyses.
Specifications:
- Purity: 99% BaCl₂
- Crystals: White and uniform
- Moisture: Maximum 0.5%
8. Polyaluminum Chloride (PAC)
Application: Wastewater treatment, flocculation of heavy metals.
Specifications:
- Al₂O₃ content: 17-18%
- Basicity: 40-90%
- Efficiency: High
Why it matters: Essential for environmental compliance with CONAMA 430/2011 (Brazil's federal standard for effluent discharge).
9. Copper Sulfate
Application: Copper plating baths, base for compound baths.
Specifications:
- Purity: 99.5% CuSO₄·5H₂O
- Pentahydrate: Blue crystals
- Iron: <10 ppm
- Lead: <5 ppm
Why it is critical: Traces of iron produce dark deposits. Lead compromises precious metal baths.
10. Zinc Dust
Application: Cementation for precious metal recovery.
Specifications:
- Purity: 98-99% Zn
- Particle size: 200-325 mesh
- Lead content: <0.01%
Strategy: Allows gold and silver to be recovered from spent solutions.
Category 4: Oxidizers
11. Sodium Hypochlorite
Application: Cyanide oxidation, clarification, cleaning.
Specifications:
- Concentration: 10-12% active chlorine
- pH: 11-13
- Free of heavy metals
Compliance: Essential for treating cyanide-bearing effluents in line with CONAMA 430/2011.
12. Hydrogen Peroxide
Application: Controlled oxidation, stainless steel cleaning, stain removal.
Specifications:
- Concentration: 35%
- Free of transition metals
- Storage: Special packaging
Category 5: Lacquers
13. Technical Lacquers
Application: Corrosion protection, sealing, finishing.
Types:
- Acrylic: General use, fast drying
- Cataphoretic: Superior adhesion
- UV sealers: Protection against radiation
- Colored: Special finishes
Professional Technical Criteria
With 53 years of experience, Boreto & Cardoso® has developed strict selection criteria.
1. Strict Quality Control
Why it matters: Suppliers with a technical structure ensure real control and a fast response.
Check:
- Control structure (in-house or certified)
The Boreto difference: We work with renowned brands that apply strict control.
2. Full Traceability
Why it matters: Fundamental for compliance and management. Without traceability, there is a risk of citations.
Check:
- Visible batch number
- Batch-specific certificate
- Manufacturing and expiry dates
- Lookup system
Test: Ask for certificates from different batches. Identical documents indicate inadequate traceability.
3. Complete Documentation
Why it matters: An outdated SDS is a frequent cause of fines.
Mandatory:
- SDS compliant with ABNT NBR 14725:2019 (the Brazilian standard for safety data sheets)
- All 16 sections complete
- Valid revision date
Complementary:
- Technical data sheet
- Certificate of analysis
- Correct invoice
- Transport documentation
4. Consistency Between Batches
Why it matters: Variation causes instability. Processes that used to work can fail with an off-spec batch.
Check:
- Maximum variation (ideally ±2%)
- Consistent appearance
- Quality history
- References in the sector
5. Specialized Logistics
Why it matters: Chemical products require specialized transport. Delays cause downtime.
Check:
- Suitable carrier
- Complete documentation
- Appropriate packaging
- Tracking available
- On-time delivery record
The Boreto guarantee: Deliveries scheduled to meet each customer's needs.
6. Real Cost-Effectiveness
Why it matters: A low price is not always a real saving.
Calculate: Total Cost = Price + Rework + Downtime + Nonconformity
Consider:
- Purchase price
- Actual yield
- Rework frequency
- Downtime caused by problems
- Environmental risks
- Bath life
Common Mistakes When Choosing
Mistake 1: Focusing Only on the Lowest Price
Problem: A large volume is bought at a "good price". Quality problems appear. Rework wipes out the savings.
How to avoid it:
- Calculate the total cost
- Run a pilot test with a small volume
- Check certificates
- Ask for references
Mistake 2: Incomplete Documentation
Problem: Generic certificates are accepted. During an audit, the product's characteristics cannot be proven. A citation is issued.
How to avoid it:
- Require a batch-specific certificate
- Check that batch and certificate match
- Keep an organized archive (5 years)
- Do not accept inadequate documentation
Mistake 3: Switching Without Validation
Problem: The supplier is replaced completely and immediately. Instabilities appear. They take time to fix.
How to avoid it:
- Pilot test with a limited volume
- Keep the current supplier in parallel
- Compare results
- Document parameters
Mistake 4: Improper Storage
Problem: Unsuitable conditions (temperature, sun, humidity). Products drift out of specification.
How to avoid it:
- Covered, ventilated area
- Controlled temperature (15-30°C)
- Humidity <70%
- FIFO organization
- Clear identification
Mistake 5: No Backup Supplier
Problem: Dependence on a single supplier. A supply problem occurs. Production stops.
How to avoid it:
- Keep an approved backup supplier
- Alternate purchases
- Test the backup periodically
- Adequate safety stock
Validation Protocol
Phase 1: Document Review
Request:
- Certificates from 3 recent batches
- Up-to-date SDS
- Company certifications
- Commercial references
- Information on technical structure
Approve if:
- Documentation is complete
- SDS is up to date
- Variation <3%
- References are positive
Phase 2: Pilot Test
Protocol:
- Buy a small volume
- Basic analysis before use
- Use in parallel with the current product
- Document rigorously
- Evaluate after 4 weeks
Approve if:
- Performance is equal or better
- No critical problems
- Team approval
- Adequate cost-effectiveness
Phase 3: Gradual Transition
Strategy:
- Months 1-2: 30% new, 70% current
- Months 3-4: 50% new, 50% current
- Months 5-6: 70% new, 30% current (backup)
Monitor:
- Monthly quality
- Problem log
- Team feedback
- Cost-effectiveness
Traceability and Documentation
Traceability System
Elements:
- Batch number on the packaging
- Specific certificate
- Manufacturing date
- Date received
- Usage history
Organization:
- Control spreadsheet
- Certificate archive (5 years)
- Link between input and waste
Benefits:
- Makes audits easier
- Allows problems to be investigated
- Meets certification requirements
- Demonstrates professional management
Documentation for Audits
Mandatory:
- Up-to-date SDSs
- Certificates for each batch
- Invoices
- Consumption records
- Waste documentation
Organization:
- One folder per product
- Monthly updates
- Annual review
- Digital backup
Storage and Management
Ideal Conditions
Environment:
- Covered and ventilated
- Temperature 15-30°C
- Humidity <70%
- No direct sunlight
- Impermeable floor
Segregation:
- Acids separate from alkalis
- Oxidizers separate from reducing agents
- Flammables in a dedicated area
- Respect incompatibilities
Identification:
- Legible original label
- Date received
- Visible batch number
- Date opened
FIFO Management
Principle: First in, first out.
Implementation:
- Physical layout that makes FIFO easy
- Clear date identification
- Periodic checks
Safety stock: Cover 30 to 45 days of consumption + lead time + a margin.
2025 Trends
1. Digital Traceability
Evolution: QR codes and blockchain will make management easier.
Benefits: Simpler audits, less fraud, immediate access to documentation.
Status: Early stage in Brazil.
2. Sustainability
Evolution: Demand for inputs with lower environmental impact.
Applications: Metal recovery, water reuse, recycling.
Status: Larger electroplating shops are already implementing it.
3. Automation
Evolution: Automated systems reduce errors and optimize consumption.
Benefits: Fewer errors, input savings, stable processes.
Status: Adopted by medium and large shops.
4. On-Site Analysis
Evolution: Portable equipment makes it possible to validate inputs on receipt.
Benefits: Immediate validation, lower laboratory costs.
Status: Significant initial investment.
Frequently Asked Questions
1. Technical grade vs analytical grade?
Technical: 95-98% purity, general processes, base cost.
Analytical: >99% purity, strict control, higher cost.
When to use: Technical grade for most processes. Analytical grade for precious metals.
2. Will a generic certificate do?
No. The certificate must be specific to the batch received, with a number that matches the packaging. A generic certificate has no legal value.
3. How do I validate a supplier?
Protocol: Document review first, then a pilot test, then a gradual transition. Keep the previous supplier as a backup.
4. Is incoming analysis worth it?
It depends: It makes sense for medium/large shops or critical processes. Alternative: reliable suppliers + certificates + visual checks.
5. How should I get organized for an audit?
System: One folder per product with SDS + certificates + invoices. Monthly consumption control. Annual review. Digital backup.
6. Domestic or imported?
Domestic: Shorter lead time, local support, documentation in Portuguese, simple logistics.
For electroplating: Quality domestic products serve most shops well with better cost-effectiveness.
7. How can I negotiate without losing quality?
Strategies: Payment terms, consolidated volume, scheduled deliveries, long-term relationship, complete package.
Do not negotiate on: Purity, traceability, documentation, support.
Complete Checklist
Supplier Evaluation
- Strict quality control
- Works with renowned brands
- Experience in the sector
- SDS compliant with ABNT NBR 14725
- Certificates available
- Relevant certifications
- Verifiable references
Product Evaluation
- Purity meets the minimum (98% for acids)
- Concentration specified
- Correct visual appearance
- Certificate matches the batch
- Successful pilot test
- Quality maintained/improved
- Team approval
- Adequate cost-effectiveness
Logistics and Receiving
- Intact packaging
- Complete documentation
- Deadline met
- Tracking available
- Damage check
- Batch/documentation check
- Certificate received
- Entered in the control system
Storage
- Suitable location
- Controlled temperature
- Adequate humidity
- Correct segregation
- FIFO organization
- Clear identification
- Safety stock
- Periodic inspection
Documentation
- Up-to-date SDSs
- Certificates archived (5 years)
- Invoices organized
- Consumption control up to date
- Traceability system
- Input-to-waste link
- Audit preparation
- Periodic review
Conclusion
Choosing the right chemical inputs directly affects quality, costs and compliance. What separates successful operations from problematic ones is the careful selection of suppliers and products.
Fundamental Principles
Technical Quality: The 13 essential products must meet strict specifications. A minimum purity of 98% in acids is a technical requirement.
Full Traceability: Specific certificates, up-to-date SDSs and complete documentation are your legal protection.
Reliable Suppliers: A long-term relationship provides stability and support.
The Boreto & Cardoso® Experience
In 53 years since 1972, we have built a reputation based on three pillars:
- Quality products (renowned brands)
- Efficient service (scheduled deliveries, complete documentation)
- Competitive prices (fair terms with flexibility)
Our Differentiators
- Complete portfolio of 13 essential products
- More than five decades of experience
- Complete technical documentation
- Nationwide service (Santana de Parnaíba/SP and Limeira/SP)
- Flexible packaging and quantities
Next Steps
Immediate (7 days):
- Evaluate your current suppliers
- Identify gaps in documentation
- Organize your files
- Get in touch with us
Short term (30 days):
- Request a quote
- Compare specifications
- Organize documentation
- Implement a receiving protocol
Medium term (90 days):
- Pilot test (if applicable)
- Set up backup suppliers
- Optimize stock management
- Prepare documentation for audits
Contact Us
Boreto & Cardoso® Ltda
Headquarters, Santana de Parnaíba/SP:
- Email: boreto@boreto.com.br
- Phone: (11) 3931-1722 | (11) 2366-6260
- WhatsApp: (11) 99108-2229 | (11) 94541-0088 | (11) 91311-3528 | (19) 97685-0233
- Address: R. Alagoas, 30 - Recanto Silvestre, Santana de Parnaíba - SP, 06530-245
Branch, Limeira/SP:
- Phone: (19) 99458-6331
- WhatsApp: (19) 99557-1693
- Address: R. Aratibá, 759 - Centro Industrial de Limeira (CIL), Limeira - SP, 13481-208
Business Hours:
- Monday to Friday: 8:00 a.m. to 12:00 p.m. and 1:15 p.m. to 5:30 p.m.
What We Offer
We provide:
- Tailored quotes
- Complete technical documentation
- Scheduled deliveries
- A transparent relationship
Request a quote and find out how 53 years of experience can contribute to the success of your electroplating operation.
Boreto & Cardoso®: 53 years of experience in industrial chemical products. Your reliable partner for electroplating inputs.
Note to the reader
This article brings together technical information drawn from different sources, with the aim of broadening knowledge about the raw materials mentioned.
It is informational material only and does not represent, on the part of Boreto & Cardoso, any indication of application, formulation or direct recommendation for use.
Boreto & Cardoso®, with 53 years of experience, acts strictly as a supplier of chemical inputs for a wide range of applications, and it is up to each user to verify the suitability and compliance of their application.
© 2025 Boreto & Cardoso®, Specialized Chemical Inputs Suppliers since 1972