Hair-on-Hide Hair Rinse 4.0 by Leather Doctor® is a pH 4.0 balanced rinse that neutralizes and restores the hair's natural integrity after cleaning.
What Is Hair Rinse 4.0?
- A water-based, pH 4.0 acidic rinse formulated specifically for hair-on hides, sheepskin, woolskin, calfskin, goatskin, feathers, and other delicate hair/fiber-based finishes.
- Comes as a concentrate and is diluted with distilled water before use.
1. pH Balancing
- After cleaning with Hair Cleaner 5.5 (pH 5.5), the rinse further pH balances, matching the natural acidity of healthy hair and hide.
- Prevents alkaline overexposure, which can cause hair frizz, static build-up, dullness, and fiber brittleness.
- Neutralizes and removes any detergent residue, suspended soiling, or urine/stain trace elements after cleaning.
- The pH-corrected finish reduces electrostatic buildup.
- Helps the hair/fiber lie smoother, feel softer, and comb or groom more easily.
4. Prevents Odors and Post-Cleaning Issues
- Alkaline residues or sweat buildup can cause odors over time.
- Hair Rinse 4.0 mitigates those risks by setting the correct acidic environment that discourages microbial growth.
- After cleaning with Hair Cleaner 5.5 (especially in heavy soiling or body contact areas).
- Before conditioning the suede side with Hydrator 3.3 and Fatliquor 5.0, to open the hide structure and allow better product penetration.
- As part of regular maintenance, especially after environmental exposure (pets, salt, sweat, urine, etc.).
Hair Rinse 4.0 helps maintain the amphoteric nature of the protein fibers by restoring the ionic equilibrium and cumulative pH integrity—a fundamental principle of Leather Doctor's Leather-Safe™ System.
| Feature | Why It Matters |
|---|---|
| pH 4.0 | Restores skin/hair acidity, protects against damage |
| Anti-frizz | Prevents static, makes hair smoother |
| Odor control | Neutralizes sweat, urine, and alkaline residues |
- Dilute 1 part concentrate to 40 parts distilled water.
1️⃣ Prepare Solution
- Add 222g distilled water into the concentrate 8oz bottle.
2️⃣ Spray & Towel Extract
- Lightly mist the area.
- Use a clean, absorbent terry towel to gently blot and extract suspended soiling.
- Repeat as needed until the towel shows clean.
3️⃣ Groom & Air Dry
- Gently groom the hair with a pet brush or slicker comb.
- Let the item dry naturally, away from heat or direct sunlight.
4️⃣ Final Groom for Bloom
- Once fully dry and slightly crispy, groom again to restore a soft, fluffy "bloom."
- After rinsing and drying, protect and condition the hair with Hair-on Hide Conditioner S Plus for a leather scent, non-stick, rub-resistant, silky feel.
Updated: April 19, 2025 | July 14, 2025 by Roger Koh