The professional cleaning of black, secured, or marked banknotes requires specialized chemical solutions that can safely remove contaminants without damaging the underlying substrate. After 15 years of laboratory testing and field application, these are the five most essential SSD products used by restoration experts worldwide:

1. Classic SSD Solution

The cornerstone of any banknote restoration process, this proprietary formula acts as a powerful yet controlled reagent that breaks down security inks and stains. Specially formulated to work with:

• Euro banknotes (all denominations)
• US Dollar bills (including new anti-counterfeiting features)
• CFA franc currencies (West and Central Africa)
• British Pound Sterling notes (paper and polymer)

2. SSD Activation Powder

This catalytic powder prepares heavily stained or aged banknotes for the cleaning process by:

• Reopening the paper's microscopic pores
• Neutralizing acidic compounds in older notes
• Enhancing the SSD solution's penetration by up to 40%

Particularly effective for notes affected by fire damage or chemical exposure.

3. Vectrol Paste Solution

Our heavy-duty solution for complex cases featuring:

• Deep oxidation from environmental exposure
• Ink stains from security marking systems
• Discoloration from improper storage

The paste's unique viscosity allows for targeted application without compromising the banknote's structural integrity.

4. Tebi-Magnetic Solution

This advanced secondary solution provides:

• Color stabilization for faded notes
• UV protection against future discoloration
• Enhanced visual clarity of security features

Particularly recommended for high-value currency restoration.

5. Zuta S4/Castro X Finishing Solution

The final step in professional restoration that:

• Creates a protective molecular layer
• Restores natural paper texture
• Provides anti-microbial properties
• Extends the cleaned note's lifespan

Professional banknote restoration requires precision, patience, and the right materials. Follow this laboratory-approved methodology to safely clean blackened currency:

Preparation Phase

Materials Needed:

• SSD Solution (appropriate for your currency type)
• Activation powder (for notes older than 5 years)
• Nitrile gloves (chemical-resistant)
• Protective goggles (ANSI-rated)
• Stainless steel or plastic tray (non-reactive)
• Soft-bristle brushes (various sizes)
• Distilled water (for rinsing)
• Finishing solution (Zuta S4 or Castro X recommended)

Step 1: Initial Assessment

1. Examine each banknote under good lighting
2. Document the type and extent of discoloration
3. Check for tears or weak spots that may require special handling
4. Sort notes by currency type and condition

Step 2: Surface Activation

For notes showing oxidation or heavy staining:

1. Lay notes flat on a clean surface
2. Using a fine sieve, lightly dust with activation powder
3. Allow to sit for 2-5 minutes (3 minutes optimal for most cases)
4. Gently brush off excess powder with soft brush

Step 3: Primary Cleaning

1. Prepare SSD solution according to manufacturer specifications
2. Immerse notes one at a time using plastic tongs
3. Agitate gently for 30-90 seconds (duration varies by currency)
4. For stubborn stains, use soft brush with gentle circular motions
5. Monitor color restoration progress closely

Step 4: Rinsing & Neutralization

1. Transfer cleaned notes to distilled water bath (room temperature)
2. Rinse for 60 seconds to stop chemical action
3. Change water after every 5-10 notes to prevent cross-contamination

Step 5: Finishing Treatment

1. Apply finishing solution with soft, lint-free cloth
2. Allow to air dry on clean, absorbent surface
3. Inspect under magnification for complete restoration

Troubleshooting Common Issues

Problem: Incomplete stain removal
Solution: Repeat activation step with 10% longer exposure time

Problem: Paper feels brittle after cleaning
Solution: Use our Paper Reconditioning Solution (PRS-3) before drying

Problem: Colors appear faded
Solution: Apply Tebi-Magnetic solution before finishing