Leather Blood Stain Remover pH 10 (Blood 10)

Blood stains contain two major components that require separate removal:

✅ Protein contamination (hemoglobin and albumin)
✅ Iron pigment residue (heme)

Because these components behave differently chemically, effective removal requires a controlled multi-step sequence to prevent damage to the leather’s collagen structure.

The Leather Doctor® protocol removes both components while maintaining the leather within its safe pH range of 3.0 – 5.0.

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 Leather-Safe™ Treatment Sequence

Blood stains are removed using the following sequence:

Blood 10 → Rinse 4.0 → Blood 1.0 → Rinse 4.0

Each step performs a specific chemical function.

Stage	Product	Function
Digestion	Blood 10 (pH 10)	Enzymatically liquefies coagulated blood proteins
Intermediate Rinse	Rinse 4.0 (pH 4.0)	Removes digested residue and neutralizes alkalinity
Chelation	Blood 1.0 (pH 1.0)	Chelates iron pigment causing dark discoloration
Stabilization	Rinse 4.0 (pH 4.0)	Restores leather pH to its stable range

 

 Principle:

Digest proteins first — chelate iron second.

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 Chemical Mechanism

Protein Digestion

• Blood is primarily composed of coagulated proteins that bind strongly to leather fibers.

• Blood 10 (pH 10) creates an alkaline environment that activates enzymes capable of breaking down these proteins.

• The proteins are liquefied and become removable during rinsing.

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 Iron Chelation

• After protein removal, iron residues from hemoglobin remain embedded in the leather.

• These iron compounds oxidize and react with tannins, producing dark iron-tannate discoloration.

• Blood 1.0 (pH 1.0) chelates the iron ions and breaks down the remaining dark stain.

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 pH Stabilization

• Leather fibers are sensitive to extreme pH levels.

• After alkaline digestion and acidic chelation,

• Rinse 4.0 restores the leather to its isoelectric range of pH 3.0 – 5.0,

• ensuring long-term fiber stability.

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 Recommended Dwell Time

Proper dwell time is essential for safe and effective stain removal.

1️⃣ Step 1 – Digestion

Blood 10 (pH 10)

Time:

10 – 30 minutes

• Allow enzymes time to break down protein contamination

• Keep the treated area moist

• Do not allow the solution to dry

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2️⃣ Step 2 – Intermediate Rinse

Rinse 4.0 (pH 4.0)

Time:

Immediate

• Apply with a sponge

• Wipe with a white absorbent cloth to remove liquefied residue

A white cloth allows visual monitoring and prevents dye transfer to the leather.

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3️⃣ Step 3 – Chelation

Blood 1.0 (pH 1.0)

Time:

3 – 5 minutes (maximum 10 minutes)

• Apply and monitor closely

• Proceed to the next step once the stain begins to lighten

Do not exceed the recommended time, as strong acidity may weaken collagen fibers.

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4️⃣ Step 4 – Stabilization

Rinse 4.0 (pH 4.0)

Time:

1 – 2 minutes

• Thoroughly rinse the treated area

• Allow the leather to dry naturally

This step returns the leather to its stable pH zone (3.0 – 5.0).

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 Treatment Time Summary

Stage	Product	Time
Digestion	Blood 10	10–30 minutes
Rinse	Rinse 4.0	Immediate
Chelation	Blood 1.0	3–5 minutes
Stabilization	Rinse 4.0	1–2 minutes

Total active treatment time:

approximately 15–45 minutes.

Strict control of the acid exposure time is essential to prevent fiber damage.

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 Blood Stain Removal Troubleshooting Guide

Leather Doctor® Leather-Safe™ System

Blood stains vary depending on age, oxidation level, and contamination with other substances such as oils or sweat.

Correct diagnosis helps determine the most effective treatment sequence.

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1️⃣ Fresh Blood Stain

Appearance

• Bright red to dark red
• Still moist or slightly tacky
• Minimal penetration into leather fibers

Cause

Fresh blood has not yet oxidized, and the protein structure has not fully coagulated.

Recommended Treatment

1. Blot immediately with absorbent white cloth.
2. Apply Blood 10 to digest the proteins.
3. Rinse with Rinse 4.0.
4. If a faint shadow remains, apply Blood 1.0 briefly.
5. Final rinse with Rinse 4.0.

Tip

Fresh stains are easiest to remove because oxidized iron complexes have not yet formed.

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2️⃣ Dried or Aging Blood Stain

Appearance

• Dark brown or black
• Hard, crusted residue
• Embedded into leather pores

Cause

Oxidation of hemoglobin converts iron into dark ferric compounds.

Recommended Treatment

Follow the complete 4-step Leather Doctor® protocol:

1. Blood 10 – digest proteins
2. Rinse 4.0 – remove digested residue
3. Blood 1.0 – chelate iron pigment
4. Rinse 4.0 – restore pH stability

Tip

Older stains may require multiple digestion cycles before the chelation step.

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3️⃣ Black Iron-Tannate Stain

Appearance

• Blue-black or dark grey discoloration
• No visible dried residue
• Looks similar to ink staining

Cause

Iron from blood reacts with natural tannins in leather forming iron-tannate complexes.

Recommended Treatment

1. Digest remaining proteins with Blood 10.
2. Rinse with Rinse 4.0.
3. Apply Blood 1.0 to chelate iron discoloration.
4. Repeat chelation if necessary.
5. Stabilize with Rinse 4.0.

Tip

These stains are chemically bonded and may lighten gradually over repeated treatments.

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4️⃣ Blood Mixed with Body Oils

Appearance

• Dark stain with greasy halo
• Slightly sticky surface
• Uneven penetration

Cause

Blood mixed with skin oils or sweat creates a combination stain containing:

• proteins
• fats and oils
• iron pigment

Recommended Treatment

1. Degrease with Degreaser 2.2 if oil contamination is significant.
2. Rinse with Rinse 3.0
3. Digest proteins with Blood 10.
4. Rinse with Rinse 4.0.
5. Chelate iron with Blood 1.0.
6. Final stabilization with Rinse 4.0.

Tip

Oil contamination can block chemical penetration, so degreasing may be necessary before blood removal.

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5️⃣ Blood on Nubuck or Suede

Appearance

• Dark spot with stiffened fibers
• Loss of soft nap texture

Cause

Blood proteins bind fibers together, creating fiber stiffness and matting.

Recommended Treatment

1. Apply Blood 10 lightly to digest proteins.
2. Blot gently to avoid fiber distortion.
3. Rinse with Rinse 4.0.
4. Use Blood 1.0 only if dark discoloration remains.
5. Final rinse with Rinse 4.0.
6. Restore nap after drying with nubuck brush.

Tip

Avoid excessive rubbing which can damage delicate fibers.

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6️⃣ Ghost Stain After Cleaning

Appearance

• Faint shadow or halo remains
• Leather appears slightly dull or uneven

Cause

Possible reasons include:

• remaining iron residues
• uneven moisture absorption
• minor dye displacement

Recommended Treatment

1. Lightly repeat Blood 1.0 chelation if iron shadow remains.
2. Stabilize again with Rinse 4.0.
3. Allow full drying before evaluating final results.

Tip

Ghost stains often fade further after complete drying.

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  Key Treatment Principles

✅ Digest proteins before removing iron.
✅ Never jump directly from alkaline to strong acid without rinsing.
✅ Control dwell time carefully.
✅ Maintain leather within the safe pH range of 3.0 – 5.0. 

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 Blood Stain Diagnostic Chart