Leather Protein Stain Remover 9.9

Leather Protein Stain Remover 9.9 by Leather Doctor® is a specialized solution designed to effectively remove protein-based stains such as body discharges, creams, egg, gravy, ice cream, milk, vomit, and other organic contaminants.

1. Any staining originating from a living person or animal likely requires this high-performance, pH 9.9 formula to break down stubborn protein matter safely and efficiently.
2. As part of the Leather-Safe™ holistic system, Acidifier 2.0 is a mandatory follow-up to neutralize the high alkalinity, restoring the leather to its ideal pH and leaving it with a healthy, squeaky-clean feel.

 Note: Refinishing may be necessary if the protein contamination has caused physical damage to the leather's topcoat.

Why is it tough to remove a blood stain from leather?

Blood stains are particularly stubborn because they’re protein-based and have a tendency to coagulate with the leather’s protein fibers, making removal more difficult—even with a specialty cleaner like Protein 9.9.

Additionally, blood contains iron, which darkens as it ages, causing stains to shift in color from tan to black, often with a visible outer ring.

To effectively remove a blood stain, two components must be addressed:

• Protein Component: Treated first using Protein 9.9, then neutralized and rinsed with Acidifier 2.0 to restore the leather’s pH and remove residue.
• Iron Component: Once the leather is dry and protein-free, any remaining rusty discoloration is treated with Tarnish 1.3, a redox (oxidation-reduction) agent, and then neutralized with Basifier 8.8 and rinse with Acidifier 2.0 again to complete the process.

Application Instructions for Protein-Based Stains (e.g., Dried and Caked Blood)

1. Mechanical Removal
   Gently brush, erase, and break up dried or caked blood using a soft brush, leather eraser, or bamboo skewer.

2. Stain Treatment with Protein 9.9
   Apply Protein 9.9 directly onto the stain. Agitate using a brush, eraser, or bamboo skewer to break up and loosen the stain.

3. Towel Extraction
   Repeat the process and blot with a clean, white towel until there is no further transfer onto the towel.

4. pH Neutralization with Acidifier 2.0
   Rinse the treated area with Acidifier 2.0, continuing until the towel extracts clean and the leather feels healthy and squeaky.

5. Post-Cleaning Inspection
   Allow the leather to dry. If any rusty discoloration appears, treat the area with Tarnish 1.3.

6. Hydration and Conditioning
   Once dry, rinse with Hydrator 3.3 to rehydrate the leather and prepare the structure.
   Follow with Fatliquor 5.0 to restore essential fat and oil content for softness, strength, and suppleness.

Updated: November 8, 2024 | April 11, 2025 by Roger Koh.