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Jermaine
07-20-2011, 04:40 PM
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Roger Koh
07-21-2011, 01:12 PM
How to restore faded aniline chair & ottoman?

Picture #1 shows the typical body sweat grease and oil stains on headrest and armrest.

Picture #3 & #4 shows the sweat damages into the leather structure.

Picture #5 shows grease stain with less structure damages – probably due to less sweat on the headrest.

Picture #2 shows topcoat wears and damages

Picture #6 shows the top sun faded with creases a sign of dryness.

Picture #7 shows the result of sun fading.

Picture #8 shows the contrast in color of unexposed areas.

Picture #9 shows topcoat damages with scratches.

Picture #10 shows unknown stain, fading and topcoat damages.

Picture # 11 shows topcoat scratches.


A holistic approach to a complete structural and finishes restoration including restorative cleaning with degreasing would entail the following processes.

Consideration of the finishes would depends on how the degreasing of pictures #3 & #4 damages from “sweat” would lead us to.

Sure with Degreaser-2.2 follows with Rinse-3.0 we would remove the penetrated foreign contamination but the damaged skin will be revealed “rough”.

If the clean surface is still tacky or slimy – it had to be further rectified with Acidifier-2.0 to return to a healthy squeaky feel same as the other non-contaminated areas.

The acidification pH concentration can be increase to match the alkalinity exposure from the sweat by using the concentrated Acidifier-2.0 to cut with distilled water with a ratio of 1: 4 instead of the regular 1: 25 to achieve a pH value of 1.0.

This weaken structure need be strengthen with Impregnator-26 from the structure up to tighten up the grain structure. This process will give a darkening effect. That is why the determine color shade has to be darken to cover-up these repairs on the hand rest.

Color wise would take the intensity of picture #8 on the left side darkest shade for the overall final color to still retain the original “Aniline” characteristic.

So this is two small areas that will decide the outcome of the overall color.

If this is understood we shall proceed with the general structure to accomplished our goal – for a complete restoration with a darker than original color.


Procedure:

A] Restoration Cleaning:
1] Apply Prep-4.4 with foam brush to the entire object, use Brush-1/Eraser-4 agitation and towel extract until it shows clean.
2] Reapply to soiled areas and let it dwell overnight.
3] Sticky residue is removed by Cleaner-3.8, Brush-1/Eraser-4 agitation and towel extract until it shows clean.
4] Spray Rinse-3.0 towel extract until it shows clean.
5] Let dry and inspect appearance, repeat as necessary.

B] Wet Prep:
Wet prep is to remove the entire topcoat for an even appearance for redying – otherwise the dyes may not penetrated the existing coating, resulting in unwanted blotchiness.
The cleanest method is o do it when the leather structure is damp and strong while the finishes becomes weak.
1] Use Razor-60 to shave off the topcoats, while rinse is sprayed on follows with towel extraction for an even appearance.
2] This process can be continued immediately after the degreasing and hydrating process as a continuous process in conjunction with rinsing and towel extraction.

C] Degreasing:
1] Apply Degreaser-2.2 to penetrated greasy areas especially head and arm rest – the product has to penetrate deeper than the stain to react with it.
2] Severe cases uses advance technique to cling wrapped the area for a longer dwelling time to control fast evaporation from the Degreaser-2.2 – even overnight.
3] The suspended soiling particulates is then rinse with Rinse-3.0 – soak wet through and cling wrapped it for an hour or so to fully wicks up the soiling particulates.

D] Hydrating:
1] Apply Hydrator-3.3 to the entire object to soak to relax the creases for a smooth surface – Plastic sheet cover up to control evaporation for an effective overnight dwelling. Take note that the moisture contents has to be tested out at every panel that a little moisture oozes out when tested between finger and thumb, otherwise this exercise is pointless. This process is also to reactivate the dormant dyestuff to resurface.
2] When the plastic is removed towel extract until towel shows clean, continue to spray and massage away the creases. Stain areas is to be re spray to wet it and extract until towel shows clean.

E] Fatliquoring:
This is the leather rejuvenating process to soften the leather when dry with suppleness, reduces creases and prevents cracking.
1] Spray Fatliquor-5.0, spread with foam brush for an even appearance without the blotchiness and let natural dry.
2] Repeat application in between drying until it’s saturated.
3] The fully saturated leather is left for slow natural drying for extra softness.
4] Brush-1/Eraser-4 wicks up residue and inspect for satisfaction.

F] Dry Prep:
This process is to further inspect the thoroughness of the topcoat stripping and smoothness of feel.
1] Stripper-2.3 is used to remove the remnant patchy topcoats with towel extraction.
2] Final rinsing is done with Rinse-3.0 to ensure evenness of appearance.

G] Structural Repairs:
This repair is to impregnate worn leather grains – to seal, strengthen and level out uneven absorption for further finishing.
It is also to fill and tightens with good leveling properties that is film forming for improve abrasion resistance.
However take note that the ill effect is the darkening effect that the intent color is able is camouflage it.
1] Apply Impregnator-26 by foam brushing into the leather structure – meant to be for below the surface.
1] Preferably to be tinted with the intended dyes for better appearance.

H] Re Dyeing:
This is done with Aniline Dye-21 an absorbent dye into the leather structure. To use it as a coating dye to cover absorption problem areas like the hand rest after repairs, Adhesor-73 is added in stages from 10 to 30% to even out the appearance.
1] Spray custom Aniline Dye-21 to reduce blotchiness; otherwise it is also applicable by foam brush to an even appearance.
2] Add Adhesor-73 to cover up absorption resistance areas to coat it for an even appearance.

I] Topcoating:
It is this transparent topcoat that will enhance the beauty of the color with depth.
1] Spray Aniline Topcoat-79G to bring out the beauty of the leather to satisfaction.

J] Non-Stick Rub Resistant Protection:
This rub resistant protection will prolong the wear of the topcoat with a natural buttery feel.
1] Shake well and spray Leather Scent-B, towel spread it, leave to dry and it’s ready to use.

Show us your work-in-progress...

Roger Koh
[email protected]

Roger Koh
07-21-2011, 01:28 PM
Products mentioned above for this project:


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Leather Doctor® Kit A3.r : Aniline Leather Degreaser Kit

Leather Doctor® Degreaser-2.2 in 60ml
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. It’s also used in assisting in the removing of solvent based stains like permanent marker, paint and nail-polish. Oil and grease based stains like: crayon, wax, ballpoint ink and lipstick.

Leather Doctor® Topcoat Aniline-79G in 60ml
This is a gloss topcoat for aniline leathers. It’s an aqueous fine particular size urethane resin emulsion topcoat to protect aniline dyestuff with excellent toughness and flexibility.

Leather Doctor® Stripper-2.3 in 250ml
This is a pH 2.3 hydrocarbon formulation leather finish stripper developed to strip leather and suede of existing finish prior to refinishing.

Leather Doctor® Leather Eraser-4
This is a 2½ x 2¼ x ¾ inch foam rubber sponge block with a crepe side for effective dry/wet soil removal.

Leather Doctor® Prep-4.4 in 60ml
This is the leather-safe milder version of Prep-7.7 with a pH value of 4.4. It’s high viscosity; designed to be painted on neatly; with a foam brush onto the leather. It works by allowing sufficient dwell-time; to penetrate, lubricate and suspense foreign soil contamination; prior to extraction with towel. It’s is used to strip foreign soil contamination prior to refinishing. Also as stains remover for: Grease based ink stains like ballpoint ink.
Water based ink stains like stamp pad ink. Dye transfer stains like blue jeans, ink prints and newsprints.

Leather Doctor® Cleaner-3.8 in 250ml.
This is a pH 3.8 all purpose leather-safe anionic cleaner that is particularly effective in emulsifying oily soils and in suspending its particulates. It works by penetrating, lubricating and suspending soiling safely and effectively through gentle chemical reaction; working in perfect harmony with all leather constituents that include the tanning agent, preservative, dyestuff and especially the fatliquor. It's safe for all leather trims including; aniline, vachetta, nubuck and suede. This product is always followed through with Rinse-3.0 as a system to a healthy squeaky feel.

Leather Doctor® Rinse-3.0 in 250ml.
This is a pH 3.0 aqueous anionic leather-safe rinse to neutralize harmful alkaline and perspiration residues; for stabilizing and strengthening leather to its neutral pH value of 3 to 5 chemistry integrity. It's safe for all leather trims including; aniline, vachetta, nubuck and suede.

Leather Doctor® Hydrator-3.3 in 250ml
This is a pH 3.3 aqueous leather-safe hydrator with active surfactantcy for lowering the interfacial tension between the protein leather fibers and its constituents. It’s for relaxing creases and wrinkle and eliminating them while damp prior to fatliquoring it. It’s for hydrating dried, stiffed or shrunk leathers to separates the crushed, stick together fibrils and relaxes them in the inter-fibrillary leather structure for effective distribution of the Fatliquor-5.0. It’s for charging the leather protein fibers below its iso-electric point positive to hydrogen-bond with the ionic negative charged Fatliquor-5.0. It’s for facilitating colloidal water movement within the leather structure during the wicking process to move soiling particulates to the surface. It’s for reactivating the dormant dyestuff to resurface thus reducing the contrast between the color coat and the leather crust. It’s for reducing or eliminate blotchiness when dry especially absorbent leathers. It’s for facilitating better finish penetration during refinishing thus providing good surface properties, especially the uniformity of surface dyeing during aniline refinishing. It’s safe for other leather trims that may include aniline, vachetta, nubuck, suede, hair-on-hide and woolskin.

Leather Doctor® Fatliquor-5.0 in 250ml
This is a pH 5.0 anionic charged micro emulsion fatliquor leather rejuvenator. It’s for replenishing original fatliquor that has diminished thru sun-bleaching, ageing, heat and alkaline exposure or cleaning. It penetrates and lubricates the leather fibers so that after drying, they are capable of sliding over one another smoothly. Besides softening the leather with stretchability, compressibility and flexibility; fatliquor enhances its rip tensile strength greatly thus reduces split or tear to the stitching and perforated holes. It 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. It’s safe for all other leather trims including; aniline, vachetta, nubuck, suede, hair-on-hide and woolskin. It is available with infused leather scent as Fatliquor LS-5.5.

Leather Doctor® Leather Scent-B in 120ml.
This is a non-film forming, non-stick rub resistant protector that enhances a soft natural buttery-feel with an unforgettable classic leather scent. It’s for imparting a non-stick breathable barrier essentially to shield the detrimental effects of sticky soiling including the nasty ballpoint ink. It is effective to release those tenacious dye-transfers stains especially on light colored leathers easily, without resorting to unnecessary color refinishing. Its natural buttery-feel protection increases the leather resistance to wet and dry rubs, thus reduces stretch, scuff and abrasion. And it reduces friction squeaks that wear the finishes when leather is rubbed against during used.

Horsehair Detailing Leather Brush-1
This horsehair detailing brush is ergonomically designed to be an extension of our hand with sturdy grooved grip, designed to produce an effective result easily and efficiently for many years to come. It’s recommended for all smooth leather, to deliver a scratch-free agitation cleaning. The length is 7 inches with a three row 1½ inches bristles cleaning head.

PolyBrush®
This is the 3” made in USA washable foam brush that last. It’s used for spreading the Prep-7.7, rinse clean and thereafter used for the leather Scent-B and Scent-D application to prevent overspray.

Washable Rags
This rag works like cloth, lint free and highly absorbent for extracting suspended soiling or for wiping the leather Scent-B and Scent-D during routine easy cleaning-protection application.



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Leather Specialty Cleaner (7)

Leather Doctor® Acidifier-2.0
This is a pH 2.0 aqueous leather acidifier; developed for dye bleeding control and neutralizing alkaline exposure that cause marks, streaks, brightness, tackiness or sliminess from spills or cleaners.
It's for Pigmented, Aniline, Vachetta, Nubuck, Suede, Hair-on-Hide and Woolskin leather types.
This product is also available in concentrate to be cut with distilled water at a ratio of 1: 25.
For severe cases the concentration can be increase to pH 1.0 by cutting with 4 parts of distilled water.


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Leather Repairer (5)

Leather Doctor® Impregnator-26
It’s a Leather Surface Repairer for Pigmented and Aniline leather types.
This is a protein compact resin blend compound impregnator.
It’s for impregnating worn leather grains and micro cracks.
It’s to seal, strengthen and leveling out uneven absorption for further coating process.
It fills and tightens with good leveling properties that is film forming for improve abrasion resistance.


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Leather Dyeing & Coloring Auxiliary (3)

Leather Doctor® Adhesor-73
It’s an auxiliary for Pigmented and Aniline leathers refinishing.
This is an aqueous compact resin adhesion promoter to ensure proper adhesion prior to color coating.
It's also added to Aniline Dye-21 for dye coating absorption resistant areas to reduce color blotchiness.
And it’s also used after WaxEffect8.6 prior to top coating.


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Aniline Leather Dyeing System (12)

Leather Doctor® Aniline Dye-21
It’s for staining absorbent aniline leathers.
This is a new generation aqueous transparent staining aniline dyestuff that is more lively and brilliant than most liquid dyes.
It’s to provide a more superior light fastness and fades resistance than most standard liquid dyes.
For coating aniline leathers that has existing topcoating; add up to 30% Adhesor-73 to even out appearance.
Standard colors available in Black-115, Orange-157, Red-180, Red-Brown-159, Yellow-128, Dark-Brown-124, Rubine-113 and Blue-119.


Roger Koh
[email protected]