Auto Leather Ink and Dye Stain Remover Kit Ap7.di

Auto Leather Ink and Dye Stain Remover Kit AP7.di by Leather Doctor removes ink and dye, pH-balance, cleans, rinses, hydrates, softens, topcoats, and conditions.

The Professional Solution for Luxury Auto Interiors:

• Kit AP7.di is a specialized restoration system designed to remove ink stains, dye transfer, and clothing color rub-off from light-colored automotive leather.
• This complete kit cleans, restores, and protects delicate leather interiors while maintaining their luxurious feel.

Key Features:

✔ Effective Ink & Dye Removal – Ink 7.7 & Dye 7.9 use Reverse Transfer™ technology to safely lift stains.
✔ Deep Cleaning & Residue-Free Rinsing – Cleaner 3.8 and Rinse 3.0 ensure a thorough yet gentle clean.
✔ Leather Hydration & Softness – Hydrator 3.3 relaxes stiffness and preps leather for fatliquoring.
✔ Rejuvenates & Strengthens – Fatliquor 5.0 replenishes essential fats and oils, restoring sotness, flexibility and resilience.
✔ Finish Restoration – Matte 54 revives worn finishes affected by friction wear.
✔ Advanced Leather Protection – Protector B provides a non-stick, rub-resistant barrier with a soft, buttery feel.

Perfect for:

✔ Luxury car interiors in light colors (white, beige, pastel, etc.).
✔ Removing ink stains, dye transfer, and soiling from daily use.
✔ Restoring softness, flexibility, and protection to delicate leather.

Easy-to-Use Concentrate

Kit AP7.di products come in concentrated form and must be diluted with 1.5 quarts (1369g) of distilled water before use.

Leather Ink Remover 7.7

Ink 7.7 is designed to break down the grease content of ballpoint ink before addressing the remaining dye component with Dye 7.9.

• After successful ink and dye removal within the Leather-Safe™ system, any remaining residue is neutralized, pH balanced, and rinsed with Acidifier 2.0 (pH 2.0).
• This process restores the leather’s natural pH balance (3-5) without the typical side effects caused by alkaline overexposure, resulting in a healthy, squeaky-clean feel.

How Ink 7.7 Works

• Ink 7.7 works through dwell time, allowing its superior penetration, lubrication, and suspension properties to remove ink via the reverse-transfer technique on non-absorbent leathers.

Leather Dye Stain Remover 7.9

Dye 7.9 eliminates dye stains without scrubbing or damaging the finish with an innovative Reverse Transfer technique.

Struggling with blue jean dye stains on your leather?

• Using this innovative Reverse Transfer technique, this high-viscosity solution lifts and transfers stains away—preserving your leather’s integrity effortlessly in sequence with Acidifier 2.0 (pH 2.0) to safely balance it back to a leather-neutral pH of 3-5.

Why Choose Dye 7.9?

✔ No Rubbing, No Damage – Removes stains gently without risking finish wear.
✔ Powerful Yet Gentle – Effectively penetrates, suspends, and lifts dye stains.
✔ Versatile & Safe – Works on non-absorbent pigmented leathers.
✔ Easy & Effective – Simply apply and let the formula do the work!
✔ Restores Leather’s pH Balance – Rinse sequence with Acidifier 2.0 to a healthy squeaky feel.  

How It Works

• For Non-Absorbent Pigmented Leather – Apply Dye 7.9 over a Towel 5 placed on the stain. The stain lifts into the towel—no rubbing required.

Leather Acidifier 2.0 

Acidifier 2.0 is a pH 2.0 acidic rinse designed to control, neutralize, and restore leather’s natural pH balance. It prevents leather from denaturing, which can lead to, tackiness, due to alkaline overexposure.

Key Benefits:

✔ Neutralizes alkaline contamination from alkaline overexposure above leather neutral pH 3-5.
✔ Prevents color streaking
✔ Reduces leather tackiness and improves texture
✔ Strengthens leather finishes and enhances structural integrity

When to Use Acidifier 2.0:

• After exposure to alkaline products (alkaline cleaners, soap, ammonia, baking soda, saddle soap, dish detergent, etc.)
• To rectify tackiness, dullness, or streaking from alkaline overexposure
• To stabilize and restore the leather’s natural pH balance

Leather Cleaner 3.8

Cleaner 3.8 is a leather-safe, pH 3.8 mild cleaner formulated to effectively emulsify and lift general soiling without causing common side effects.

Key Benefits:

✔ Gently Cleans Without Harsh Effects – Maintains leather’s finishes integrity
✔ Works Seamlessly with Ink 7.7 – Allows for after cleaning of sticky residue
✔ Prevents Streaks & Tackiness – Ideal for all leathers
✔ Residue-Free with Rinse 3.0 – Restores leather’s pH balance for long-term care

How It Works:

• Cleaner 3.8 is designed to break down and suspend dirt for easy removal while keeping the leather's structure intact.
• When followed by Rinse 3.0, it ensures a neutralized, residue-free finish, preventing unwanted side effects such as stiffness, discoloration, or over-drying.
• This makes it especially beneficial for all leather types.

Leather Rinse 3.0

Rinse 3.0 is a pH 3.0 leather-safe rinse formulated to remove suspended soil and restore the pH balance of leather, ensuring its structural integrity and long-term durability.

Key Features & Benefits:

✔ Removes Suspended Soil – Lifts and extracts emulsified soiling for a clean, residue-free finish
✔ Neutralizes Alkaline Residues – Restores pH balance to prevent damage from alkaline overexposure
✔ Prevents Tackiness & Dye Bleeding – Stabilizes the leather structure, reducing unwanted texture changes
✔ Enhances Leather’s Ionic Charge – Recharges the leather with a positive (+ve) charge, improving its ability to bond with negatively (-ve) charged tanning agents, dyestuff, and fatliquor
✔ Preserves Suppleness & Durability – Helps maintain the leather’s softness, preventing stiffness and cracking

This essential finishing rinse ensures leather remains clean, soft, and structurally sound after the cleaning process.

Leather Hydrator 3.3

Hydrator 3.3 is a pH 3.3 hydrating conditioner designed to relax, soften, and restore leather’s natural integrity while preparing it for fatliquoring.

Key Benefits:

✔ Restores Leather Stiffness & Flexibility – Relaxes stiff fibers and prevents brittleness
✔ Smooths Out Creases & Wrinkles – Prepares leather for optimal conditioning
✔ Prepares for Fatliquoring – Enhances absorption of essential fats and oils
✔ Residue-Free & Non-Sticky – Ensures a clean, breathable finish

How It Works:

• Hydrator 3.3 penetrates deep into the leather, reducing surface tension and allowing for colloidal water movement to reactivate dyes and even out color inconsistencies.
• It plumps the leather structure, making it more receptive to fatliquoring with Fatliquor 5.0, which restores essential fats and oils for long-term suppleness and durability.

Hydrator 3.3 is an essential step in rejuvenating aged, dry, or stiff leather, ensuring lasting flexibility, color vibrancy, and overall leather health.

Leather Fatliquor 5.0

Fatliquor 5.0 is a pH 5.0 micro-emulsion of fat, oil, and water to restore the leather's original softness, strength, and flexibility.

How It Works:

✔ Replenishes Essential Fats & Oils – Prevents leather from drying, stiffening, or cracking
✔ Enhances Leather’s Suppleness & Elasticity – Maintains a soft, luxurious feel
✔ Strengthens Leather Fibers – Improves tensile strength and durability
✔ Creates a Breathable Structure – Ensures leather remains pliable without feeling greasy
✔ Prevents Brittleness & Fiber Breakage – Essential for long-term leather preservation

Application Process:

• When applied, the water-encased fat and oil molecules penetrate deep into the leather fibers.
• As the water gradually evaporates, the fat and oil molecules hydrogen bond with the fibers, creating a breathable, flexible structure that enhances leather’s resilience and longevity.

Leather Finish Topcoat Matte 54

Matte 54 is a water-based polyurethane topcoat with a matte luster that provides a durable, flexible, and protective film.

Key Features:

✔ Soft & Flexible – Forms a tough yet flexible film that enhances leather durability.
✔ Lightfast & Non-Yellowing – Maintains color integrity without fading over time.
✔ Superior Flow & Leveling – Ensures smooth, even application.
✔ Enhanced Water Resistance – Achieves extra toughness against moisture when crosslinked with Crosslinker 64 (recommended ratio: 1:95).

Available Variants:

• Matte 54 (low sheen)
• Satin 54 (medium sheen)
• Gloss 54 (high sheen)

Perfect for automotive, furniture, handbags, garments, and upholstery restoration projects.

Instruction: 

Step 1 - Ink Removal:

1. Using Reverse Transfer Technique, a stretchable Towel 5 is placed over the ink stain to act as an extension of the leather's surface.
2. Ink 7.7 is applied with Brush 1, ensuring any air bubbles are squeezed out for optimal contact.
3. Allow overnight to suspends the ink stain, which is then wicked into the towel and safely lifted from the leather.
4. The process is repeated until the ink stain is fully removed and the towel remains clean.

Step 2 - Dye Removal: 

1. Using Reverse Transfer Technique, place Towel 5 over the remaining dye stain, apply Dye 7.9, and squeeze out any air bubbles in between.
2. Allow overnight for the suspended dye stain to be transferred to the paper towel.
3. Inspect for satisfaction or repeat above 1 and 2 until satisfaction.
4. Restores Leather’s pH Balance by rinsing with Acidifier 2.0 to ensure a healthy, squeaky feel.

Step 3 - Acidifying Rinse:

1. Acidifier 2.0 concentrate is mixed with distilled water 1: 25 before use.
2. Apply evenly, brush, and towel extract until it shows clean.
3. Inspect for tackiness satisfaction, otherwise, repeat treatment accordingly.

Step 4 - Cleaning:

1. Cleaner 3.8 concentrate is mixed with distilled water 1: 64 before use.
2. Apply and agitate with Brush 1.
3. Dwell for 3 to 30 minutes or before it dries for complete soil suspension.
4. Extract suspended sticky residue with a dry highly absorbent towel until it shows clean.
5. Remaining residue is rinsed to a healthy squeaky clean with Rinse 3.0.

Step 5 - Rinsing: 

1. Rinse 3.0 concentrate is to be mixed with distilled water 1: 40 before use.
2. Apply, brush accordingly, and extract until the towel shows clean. 
3. Finger test for a healthy squeaky feel.
4. Continue with hydration.

Step 6 - Hydrating:

1. Hydrator 3.3 concentrate is to be mixed with distilled water at ratio 1: 25 before use.
2. Pretest, apply, and work into cleaned leather.
3. Accelerate saturation by working on micro-cracks, stitching seam, or perforated panel for a darkening effect.
4. Optional thorough saturation is achieved by covering with a soaked-up stretchable Towel 5.
5. Allow 1 to 72 hours of dwelling for effective relaxing results.
6. Continue with Fatliquor 5.0, allowing 5/6 of the water to evaporate, and when almost dry, massage to the desired suppleness.

Step 7 - Fatliquoring:

1. Fatliquor 5.0 concentrate is mixed well before adding warm distilled water 1: 5 before use.
2. Apply and redistribute with Brush 1 or Foam 2 until structure is saturated.
3. Repeat each cycle water contents evaporate leaving behind only the fat and oil content.
4. Allow natural drying for extra softness.
5. The desired suppleness is further staked and massaged, accordingly with a little wet back with Hydrator 3.3 until dry.
6. Dry prep when dry for topcoat refinishing.

Step 8 - Topcoating:

1. Matte 54 concentrate is mixed with distilled water of 1: 3 before application.
2. Use foam, soft fine brush or airbrush for professional results.
3. Apply a panel at a time for even coverage, avoiding streaks, drips, and spits.
4. Let dry or speed dry between coating and continue with subsequent 2 to 3 coatings.
5. Condition with Protector B.

Step 9 - Conditioning:

1. Protector B concentrate is mixed with distilled water 1: 19 before use.
2. Shake well, mist spray, and spread with a brush/pad and it is ready to use when dry.
3. During routine application, use a lint-free white towel to pick up soiling at the same time.

 By following these steps, ink stains can be safely and effectively removed while maintaining the leather's durability and natural balance.

 Updated: April 5, 2025 by Roger Koh