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  1. #1
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    Default heavy body oil on analine chair

    Hello,

    I acquired this chair and have hopes of restoring it to a usable condition. The headrest area and arms are heavily soiled with what I believe are body oils. I would appreciate advice on how to tackle this project with which products to use and how much (what size) product. Thank you for sharing your expertise and time.

    Rebecca

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  2. #2
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    >>> I acquired this chair and have hopes of restoring it to a usable condition.

    We need to establish what is the level of usable condition, the condition of the leather structure is the primary concern. Other conditions are appearance, etc. As this is a restoration attempt there is also a limitation to return to a new-like condition in all areas.


    >>> The headrest area and arms are heavily soiled with what I believe are body oils.

    Yes, the body oil clogs up all the breathing pores that turn it darker in appearance, and once the body oils are removed it will appear lighter. However, it will need many attempts to wick up the body oils. An analogy would be looking at the seashore with debris and each high tide will just leave a portion on the beach to be removed, the remainder will still need another high tide to bring it in. Similarly, it will require many rounds of degreasing and loosing up the stuffed oil to be extracted in each degreasing and drying cycle. As the body oil is removed, Hydrator-3.3 > Fatliquor-5.0 system has loosened up and separated the fibers before the Fatliquor-5.0 can reach a hydrogen bonding with the leather protein fiber (based on the theory and practice of leather-chemist practice). In this wet process, we are attempting degreasing, pH balancing of the leather protein fiber, and restoring the lost original fatliquor at the same time.


    >>> I would appreciate advice on how to tackle this project with which products to use

    I will give tips once the first two attempts are achieved.

    And you can further read more details from this link:

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    http://www.leatherdoctor.com/leather...ng-kit-aw6-tc/

    I will also warn you of avoiding leaving the leather dry without replenishing fatliquor sufficiently, otherwise when dry too fast the existing cracks will be made worse.

    The more questions you would ask the better result you will achieve.


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    Roger Koh
    Leather, Skin, Hair, Eye & Acne Care System Formulator
    Consultant / Practitioner / Instructor / Coach
    web: www.leatherdoctor.com
    forum: www.leathercleaningrestorationforum.com
    email: [email protected]

  3. #3
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    Thank you for your reply Mr. Koh,
    When I meant by "usable" condition is to remove as much of the body oil soiling as possible and fix the "stickiness" of the headrest area and arms. I will begin with the degreaser 2.2 and, per your suggestion, use Hydrator-3.3 > Fatliquor-5.0 in conjunction to balance the pH and restore some of the fatliquor content. If I can achieve a good level of body oil reduction during the repeated application of the degreaser 2.2>Hydrator 3.3>Fatliquor5.0, I'll update with photos and more questions.

  4. #4
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    >>> and fix the "stickiness" of the headrest area and arms.

    When leather becomes ‘sticky’ it means that it has denatured and that the leather amphoteric material has shifted ionic negative (-ve). This ‘stickiness’ problem is fixed during the Degreaser-2.2 > Acidifier-2.0 degreasing-rinsing-pH conditioning process. Degreasing is to move the stuffed body oils out of the leather structure and Acidifying is the process of rinsing the release of body oil and charging the leather structure ionic positive (+ve). From the tactile feel, you will experience the leather lose its stickiness feel and gain a squeaky feel. Then it is ready to relax the stick together fibers in the structure with the Hydrator-3.3 and Faliquor-5.0 process. CAUTION! Never allow the leather to dry without fully replenishing with enough Fatliquor-5.0 (ionic negative fat and oil), otherwise, the leather crack will be made worse. In today's modern tannery terms what I described as the 2 modules is classed as the “WET-PROCESS”. It means NEVER let the leather structure 100% dry (only up to 25% before the next continuous process.)

    Please clarify, before you proceed.

  5. #5
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    For your reading about Degreaser-2.2

    Product Description
    Leather Doctor® Degreaser-2.2 is a pH 2.2 leather-safe water-based degreaser with dye bleeding control. It is formulated for degreasing leather of penetrated oil, grease and sweat stains from skin, and hair contact, especially the headrest and armrest of upholstery, collar, and cuffs of a garment, handles of the bag including the steering wheel. It works best in conjunction with Rinse-3.0 to rinse surface soiling or Acidifier-2.0 for penetrated soiling. Hydrator-3.3 deep structural saturation further helps in releasing and moving suspended soiling by squeezing over a highly absorbent cotton towel until towel shows clean. The remaining suspended soiling is further moved by saturation and allows wicking by reverse-transfer through tight surface contact with Towel-5. To remove penetrated soiling completely off the surface will require the three steps of penetration, suspension, and extraction by Degreaser-2.2 > Acidifier-2.0 > Hydrator-3.3 system. This universal leather-safe degreaser is for all leather types including the varieties of pigmented, aniline, vachetta, nubuck, and suede.

    A- Dry Soil Removal with Brush-1 & Eraser-4 for leather, Brush-2 & Eraser-4 for nubuck, and Brush-3 & Eraser-5 for suede: A1- Brush with leather Brush-1/2/3. A2- Erase with leather Eraser-4/5. Then, vacuum nubuck and suede of loose soiling accordingly prior to degreasing.

    B- Degreasing with Degreaser-2.2: B1- Shake Degreaser-2.2 until it gels, saturate to reach penetrated soiling with appropriate above mentioned Brushes and Erasers and extract with dry terry cotton towel until towel shows clean. B2- Re-apply and allow dwelling 5 to 60 minutes or before it dries for a complete soiling suspension to occur and towel extract until it shows clean. B3- Immediately proceed to C(a) or C(b) for surface rinsing.



    C1- Surface Rinsing with Rinse-3.0: C1:1- Spray Rinse-3.0 and use dry terry cotton towel to extract until towel shows clean, let dry and proceed to F. C1:2 - To reduce tackiness due to prior alkaline over-exposure proceed to use Acidifier-2.0 C2.

    C2- Structural Rinsing with Acidifier-2.0:
C2:1- Spray Acidifier-2.0 to saturate penetrated soiling and use dry terry cotton towel to extract until towel shows clean, let dry and proceed to F or D for extra structural wet soil removal.



    D - Extra Structural Wet Soil Removal with Hydrator-3.3: D1- Spray Hydrator-3.3 to again saturate penetrated soiling and use dry terry cotton towel to extract until towel shows clean. D2- Extra extraction is by repeat saturation and indirect squeezing through a dry towel with an appropriate spatula until towel shows clean and let natural dry to inspect for satisfaction or proceed to E- Structural soil reverse-transfer technique.

    E- Structural Soil Reverse-Transfer Technique with Towel-5: E1- The leather structure is again saturated and Towel-T5 is wet-stretch out with Brush-1 void of air space and let dry naturally. E2- When it is crispy dry peel off Towel-5. E3- Proceed to dry soil removal (F).

    F- Dry Soil Removal with Brush-1 and Eraser-4:
F1- Lightly stretch the leather to open up the pores. F2- Brush with leather Brush-1.
F3- Erase with leather Eraser-4.
F4- Inspect for satisfaction, otherwise repeat or proceed to other revealed class of stain removal system.

    When soiling and stains are removed to satisfaction, proceed to leather rejuvenation with Hydrator-3.3 > Fatliquor-5.0 > Hydrator-3.3 system.

    Tips:
    Optimum fatliquor (fat and oil) moisture content in dry healthy leathers is up to average14% when read with a leather moisture meter or an equivalent. Existing cracks magnifies when fatliquor moisture content falls below 7% level when dry for most leather and especially for the naked vegetable-tanned leathers popularly known as Vachetta.

    Leather by nature is both hydrophilic and oleophilic and easily absorbs body contact oil, grease, and sweat. Penetrated and prolong soiling contamination that has high sweat content tends to denature the leather that manifests as stickiness, with a dye-bleeding problem. Leather-safe degreasing with charging the protein fiber ionic positive is the science and logic approach to effective degreasing. In addition to a deep non-hazardous and non-toxic degreasing, the leather is reverted from denaturing into rawhide. Degreasing at a low pH of 2.2 below the average iso-electric point (pI) of leather revitalizes the ionic attraction. The amphoteric protein fiber returns to its ionic positive attraction towards the negative leather constituents that include the tanning agent, dyestuff and fatliquor. When such contamination is thereafter rinsed with Acidifier-2.0, the leather returns to a healthy squeak with reducing dye bleeding in a leather-safe water-based system. Moreover, the leather is softer when dry without leaching out of its original fat and oil as associated with a dry solvent system. Visit www.LeatherCleaningRestorationForum.com for a detail discussion prior to use.

  6. #6
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    for your further readings - Acidifier-2.0

    Product Description
    Leather Doctor Acidifier-2.0 is a water-based pH 2.0 leather acidifier rinses formulated for controlling absorbent leather dye bleeding in conjunction with Degreaser-2.2 oil, grease, and sweat decontamination system. As a standalone, it is used for pH balancing alkaline overexposure that manifests as marks, streaks, brightness, and tackiness. This universal acidifier is for all leather types including pigmented, aniline, vachetta, nubuck, suede, hair-on-hide, and woolskin leather types.


    Instructions:

    1 - Spray direct sufficiently and agitate with appropriate leather horsehair brush-1, nubuck nylon brush-2 or suede brass brush-3.

    2 - Towel extract suspended soiling until it shows clean.

    3 - To dwell 10 to 30 minutes depending on exposure severity and let naturally dry to see the result.

    4 - Wick-up soiling is removed by brushing or erasing accordingly.

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