Corbusier Leather Chairs, 5 LC3 and 2 LC4 of vintage 1970 -restoration.

>>> We have 5 LC 3 and 2 LC 4 Corbusier Chairs. Vintage 1970s. They are in good condition but show some surface color wears like on arms. Would like to provide good restoration for suppleness and color.

These Corbusier chairs are classic in design, not only for its utility, it is also a work of art for display. The modular cushions are slotted into a metal frame and are easily removed for restoration work.

1- From the pictures the chair is out of form and line and that need to be rectified accordingly. This rectification is done with readjusting the cushion from unzipping the leather covering.

2- If the intention is to restore the finishing coloring then the restoration preparation cleaning should be done with Degreaser-2.2 > Acidifier-2.0 > Hydrator-3.3 system. All other known stains are removed accordingly during this step-2.

3- Suppleness restoration to replenished diminishing original Fatliquor-5.0 is performed with Hydrator-3.3 > Fatliquor-5.0 system. A 15% fatliquor (ionic negative -ve charged fat and oil) read from a leather moisture meter when dry will return to the original suppleness and stitch-tear-strength. Standard tear strength is 2000psi. Below 1800psi the suppleness and stich tear strength may be compromised. Thus fatliquor is the “life-blood’ of leather and will determine the physical integrity of the leather.

4- The above 3 steps that ends with Fatliquor-5.0 is known as the “wet-process”.

5- The “dry-process” starts with repairs with this sequence - Sanding off deteriorating existing finishes follows with appropriate Impregnator-26 > Bond-3D/Bond-7A > Adhesor-73 accordingly to a smooth surface.

6- Color restoration is done with Adhesor-73 > Micro-54 > MicroTop-54S (satin luster) > Protector-B/B+.

Let me know, if you need further clarification of the above tips.

Leather Problem Solving Matrix/Instruction/Guide
Attachment 8112

Here is the start-up kit for your leather types (mono-tone pigmented/micro-pigmented and if the reverse suede side is of the same color range as the surface then it is also know as “semi-aniline leathers).

Attachment 8113
http://www.leatherdoctor.com/kit-sa7...finishing-kit/

Leather Doctor® Kit Sa7.cl, micro-pigmented leather color refinishing kit is design for a holistic restoration approach to not only the finishes but also rejuvenating the leather for suppleness. Most of these repairs may range from missing finishes to abrading damages into the leather structure. Some expose areas may be contaminated with foreign soiling that includes conditioners, protectors, body oil, grease and sweat or alkaline overexposure from cleaners. A comprehensive repair for a long-term lasting solution will require a holistic approach to deal with both the exposed structure and surface finishes. The practical and functional softness and strength of the leather depends on the health of the structure with average thickness between 0.9 to 1.2mm from stiffness and cracking. The aesthetic aspect of the leather finishes averages 0.02mm (or 20 micron) in thickness for practical compressing and flexing from cracking. A leather-safe restoration system begins by stripping with Stripper-2.3 and rinsing with Rinse-3.0. Degreasing with Degreaser-2.2 follows with Acidifier-2.0. The suffix numbers of these four products denotes it pH value for recharging the protein fiber ionic positive besides the act of decontamination. The leather integrity is revitalizes once the ionic attraction between the positive protein fiber and its negative leather constituents like the tanning agent and fatliquor (fat, oil and water) is initiated. Leather rejuvenating system for softness and strength is accomplishes with Hydrator-3.3 follows with Fatliquor-5.0. Surface uneven absorption is seals with Adhesor-73 to reduce the need for color over-coating thus increase its flexibility and stretchability from premature cracking. Protector-B imparts a non-stick rub-resistant surface with a buttery feel, reduces noises that translate into less friction wear. As the leather surface is well lubricated it reduces compression when comes to heavy body contact thus reduces compressed creases and wrinkles.

Instruction:

Stripping Existing Deteriorating Finishes:
1. Cover and tape off frames, trims and protect flooring.
2. Mist sprays Stripper-2.3, Eraser-4 scrub with help of 2000-grit sandpaper feathering out seamlessly and towel extract for an even appearance.

Degreasing:
1. Shake Degreaser-2.2 to gel prior to use with a repeat shake and rest until it gels.
2. Transfer to Eraser-4; agitate to saturate the stain, feather out to the entire section.
3. Towel extracts suspended soiling after 10 to 30 minutes or before it dries until it shows clean.
4. Spray Acidifier-2.0, towel extract until it shows clean to a healthy squeak.

Hydrating:
1. Spray Hydrator-3.3 saturating the stain area and feather out for an even appearance.
2. Covering with tissue paper without airspace to trap wick up stains instead of remaining on the leather surface as it dries.
3. Peel tissue paper when crispy dry and use Eraser-4 to erase surface residue prior to fat and oil replenishing.

Fat and Oil Replenishing:
1. Spray Hydrator-3.3 to precondition the leather prior to fat and oil replenishing.
2. Spray Fatliquor-5.0 and redistribute with foam brush until saturation.
3. Repeat application each time water contents evaporate until fully saturated.
4. Drive remaining surface remnants free of milky fat and oil until it turns clear with Hydrator-3.3.
5. Allow natural drying for extra softness.

Dry Prep:
1. Erase wick-up residue with Eraser-4 prior to repairs.

Adhesion Promotion Coating:
1. Apply Adhesor-73 by foam brush to seal surface uneven absorption rate and promote adhesion simultaneously.

Color Coating:
1. Apply color matching Micro-54 + 10% Thickener-48 for flow control and airbrushing for professional result.
2. Fine dry atomize dispersion with more air is achieve with 80 to 100psi of air pressure.
3. Light spray is preferred and let dry in between coats to build up colorcoat.

Topcoating:
1. Shake the product well and apply by airbrushing for professional result.
2. Use lint free paper towel to even out drips and streaks.
3. Speed dries between coats with help of hair dryer.
4. 2000-grit sanding may applies to improve touch and appearance.

Rub-Resistant Protection:
1. Mist sprays Protector-B redistribute with a foam brush / paper towel and ready for use when dry.