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Thread: Nubuck - How to Corrective Clean and Rejuvenate Nubuck to its Suppleness and “Finger Writing Effect” with a Silky-Feel!

  1. #1
    Join Date
    Mar 2007
    Posts
    75

    Default Nubuck - How to Corrective Clean and Rejuvenate Nubuck to its Suppleness and “Finger Writing Effect” with a Silky-Feel!

    This is a set of 4 chairs and 1 sofa in a high-end motel. I think the set is 2 or 3 years old, of course this is the first time it will see any care.


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    There are a few armrests with some oil build up & one head rest.

    These areas are dark & shiney, but dont look disgusting like some do after years of build up.

    Is this the process you would recommend?

    Restorative cleaning process includes:

    1. Degreasing areas of build up, i.e. chair headrest & armrests.
    (Degreaser-2.2 This is a pH 2.2 high viscosity aqueous formulated leather degreaser. It’s primarily for degreasing leather of penetrated oil and grease stains from skin and hair contact).

    2. For most of the other stubborn spots Super Cleaner-4.9:
    (This leather-safe pH 4.9 aqueous super preconditioner is designed for greasy soiled leathers. It works by allowing sufficient dwell-time for complete soil deflocculation to occur).

    3. Cleaner-3.8:
    (This is a pH 3.8 all purpose leather-safe anionic cleaner that is particularly effective in emulsifying oily soils and in suspending particulates. It cleans by penetrating, lubricating and suspending soiling safely and effectively through gentle chemical reaction. Its pH value works in perfect harmony with all leather constituents that include the tanning agent, preservative, fatliquor, dyestuff and others).

    4. Rinse-3.0:
    (This is a pH 3.0 aqueous leather-safe rinse to neutralize harmful alkaline and perspiration residues. It’s for stabilizing and strengthening leather constituent pH chemistry integrity. And cationizing (+ve) protein fiber below its isoelectric point to increase hydrogen bonding prior to anionic (-ve) Fatliquor-5.0).

    5. Acidifier-2.0:
    (This is a pH 2.0 aqueous leather acidifier. It’s for cationizing the leather protein fibers below its isoelectric point to increase hydrogen bonding with the anionic aniline dyestuff for bleeding control. Also it’s commonly used to neutralize alkaline exposure that cause marks, streaks, brightness tackiness or sliminess from stains or cleaners).

    6. For any remaining blochiness or spots, I wrap the areas in tissue paper & plastic after applying Hydrator-3.3:
    This is a pH 3.3 aqueous leather-safe hydrator. It’s for hydrating dried, stiffed or shrunk leathers (to separates the crushed, stick together fibrils and relax them) prior to Fatliquor-5.0. And it’s also used for facilitating colloidal water movement within the leather structure capillary motion during the wicking process. That will cause suspended soil particulates to be moved to the leather surface to be extracted with rag while damp and erase with Leather Eraser-4 when dry).

    7. Fatliquor-5.0:
    (This is a pH 5.0 anionic charged micro emulsion fatliquor leather rejuvenator. It’s for replenishing original fatliquor that diminishes thru sun-bleaching, ageing, heat and alkaline exposure or cleaning. It penetrates and lubricates the leather fibers so that after drying they will be capable of sliding over one another smoothly. Besides softening the leather with stretchability, compressibility and flexibility, fatliquor enhances its rip tensile strength greatly. Thus relaxes coarse breaks, creases and wrinkles to provide drapes, suppleness and prevents cracking. It helps to keep leather at its optimum physical performance and prevent premature ageing).

    8. Silky-Feel:
    (This is a non-film forming, non-stick protector that enhances a natural silky-feel. It imparts a non-stick surface essentially to shield the detrimental effects of sticky soiling including the nasty ballpoint ink. And it does help to release those tenacious dye-transfer stains especially on light colored leathers easily without resorting to unnecessary color refinishing. Its natural silky-feel protection increases the leather resistance to wet and dry rubs, thus reduce stretch, scuff and abrasion. And it reduces friction squeaks that wear the finishes when leather rubs against leather during movement).

  2. #2
    Join Date
    Feb 2007
    Location
    Greater Vancouver, Canada.
    Posts
    4,923

    Default

    When degreasing body oils and grease, these contaminations may contain urea from perspiration too.

    The urea contents from perspiration causes the pH value to shift to alkaline that destabilize the hydrogen-bonding between the leather fibers and the anionic aniline dyestuff.

    That is the reason you will see more dye bleeding in these perspiration/grease/oil areas.

    To rectify the dye bleeding problem use Acidifier-2.0 after Degreaser-2.2 instead.

    After your Hydrator-3.3 process #6 inspects after dry soil removal, mist wet with Hydrator-3.3 to check for even surface tension especially the contamination areas prior to fatliquoring.

    After your Fatliquor-5.0 process #7 exfliolate to bring up new nap with nubuck Eraser-5.

    After your Silky-Feel or Leather Scent-S #8 use nubuck Brush-2 to restore the “finger writing effect” a characteristic of what nubuck should be.

    Will be looking forward to every steps of this Nubuck Restoration Cleaning and Leather Rejuvenating Process in pictures.


    Roger Koh
    Leather Doctor®

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