People Also Ask:
- How Reverse Transfer Technique Works with Prep 7.7?
- How does Prep 7.7 work with Dye 7.9 in Ballpoint Ink Removal?
- How to Remove Prep 7.7 Sticky Residue?
- What Stain Does Prep 7.7 Work on?
- What Stain does Prep 7.7 need Dye 7.9 to continue working?
1 How Reverse Transfer Technique Works with Prep 7.7?
- The reverse transfer technique allows suspended soiling to wick through a tight, absorbent, stretchable paper towel and be peeled off.
2 How does Prep 7.7 work with Dye 7.9 in Ballpoint Ink Removal?
- Prep 7.7 works to remove the mixture of solvents and fatty acids paste component of ballpoint ink, leaving the dyestuff to be further easily removed with Dye 7.9 effectively.
3 How to Remove Prep 7.7 Sticky Residue?
- Prep 7.7 sticky residue is removed with Soft 3.8 and pH balancing rinse with Rinse 3.0 as a holistic system.
4 What Stain Does Prep 7.7 Work?
- Prep 7.7 works on accumulated soiling, chewing gum, silicone shine, sticky label residue, etc.
5 What Stain does Prep 7.7 need Dye 7.9 to continue working?
- The dye component of compound stains will require an effective follow-up dye removal with Dye 7.9, such as ballpoint Ink, blue jean dye, crayon, leather belt, plastic Ink print, marker, newsprint, stamp pad ink, etc.
Leather Strong Prep Cleaner 7.7 by Leather Doctor®
Tannery-Grade Alkaline Prep for Non-Absorbent Leathers
Leather Strong Prep Cleaner 7.7 by Leather Doctor® is a pH 7.7 mild alkaline preparatory cleaner designed for non-absorbent Bicast, Pigmented, and Simulated leathers. It safely removes heavy soiling, body oils, and aged conditioners while preparing the surface for refinishing or conditioning treatments.
This cleaner forms part of the Leather-Safe™ System, ensuring that the leather’s pH integrity (3–5) is maintained when followed by Rinse 3.0 and Acidifier 2.0.
Key Features & Benefits
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Deep Soil Penetration & Lubrication
Effectively breaks down accumulated grime and aged conditioners without the need for aggressive scrubbing. -
Safe for Coated Leathers
Specially formulated for Bicast, Pigmented, and Simulated leathers where deep absorption is not required. -
pH-Balanced Leather System
Works in tandem with Rinse 3.0 (pH 3.0) to restore the ideal leather pH range, preventing brittleness and surface damage. -
Restores Healthy Surface Feel
Use Acidifier 2.0 to neutralize any alkaline overexposure and restore a natural, squeaky-clean feel. -
Preparation for Protection
Completes the deep-cleaning phase and preps the surface for conditioning with Protector B to achieve a buttery-soft, non-stick finish.
Recommended Cleaning Process
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Apply Prep 7.7
Spread evenly with a foam brush and allow dwell time for soil suspension.
Agitate gently in circular motion using a horsehair brush. -
Towel Extract
Wipe off loosened soil with a clean towel until the towel shows clean. -
Follow with Soft 3.8
Apply and agitate in a circular motion to remove sticky residues and emulsified soiling. -
Neutralize with Rinse 3.0
Apply in circular motion, towel extract until clean, restoring the healthy squeaky feel. -
Optional: Use Acidifier 2.0
For tacky surfaces caused by alkaline overexposure, apply Acidifier 2.0 to reestablish a smooth, firm feel. -
Finish with Protector B
Apply Protector B to condition, protect, and impart a buttery, non-stick touch.
For Stubborn Greasy or Dye-Based Stains
When stains include dye components—such as ballpoint ink, blue jean dye, crayon, leather belt marks, plastic ink prints, newsprint, or stamp pad ink—follow up with Leather Doctor® Dye 7.9 for optimal stain removal results.
Why Choose Leather Doctor®
Leather Doctor® products are tannery-grade solutions designed for professional leather care and restoration. Each formula follows the Leather-Safe™ System, ensuring optimal pH control and long-term leather integrity.
Perfect for:
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Bicast Leather
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Pigmented Leather
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Simulated Leather
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Vinyl-Coated Finishes
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Automotive & Upholstery Leathers
Leather Doctor® — The Tannery-Grade Standard for Leather Restoration and Protection.