Marc by Marc Jacobs - Lambskin Leather Handbag – Hair Spray damaged and Leather is very Hard and Rough.

It is mainly the propellant that causes the original leather fatliquor to leach out.
Softness of the leather depends much on the percentage of fatliquor in the leather and up to 14% is the standard practice for modern tannery that makes these buttery soft lambskin leather.

To rejuvenate the leather back to its original suppleness with softness and strength the sequence of damages need to be reversed.
1st – The stiffness need to be relaxed with Hydrator-3.3 until the leather is limp and plump.
2nd – While still damp Fatliquor-5.0 replaces the Hydrator-3.3 as the water content of both products evaporates.
3rd – Before the leather is completely dry at 25% moisture level the leather is staked or massaged or flexed in all direction to soften it until dry to 14% or thereabout.
Note: Three levels of reading can be taken, 1st at its existing condition and comparing to other non-overexposed areas. 2nd at the near drying stage for physical manipulation and 3rd at the end of the drying stage. Topping up of the desired percentages of fatliquor continues until satisfaction.

Roger Koh
Leather Care Consultant

For further readings:

Attachment 4198
Leather Doctor® Kit-A3 : Aniline Leather - Care Kit

Leather Doctor® Kit-A3, aniline leather, care kit is an innovative leather-safe (pH 3 - 5) system designed for keeping leathers at their highest level of appearance, maintaining its pH chemistry integrity, enhancing their suppleness and prevents premature ageing. Leathers that faced the sun, closed to fireplace and heaters dries out the fatliquor (fat and oil) that keeps it supple sooner than the non-heat exposed areas. The diminishing of the fatliquor through evaporation results in the leather fibers being stick closer together that results in stiffness and when flexed during used will lead to cracks. Periodic use of Hydrator-3.3 to plumps the stick together fibers prior to fatliquor replenishing with Fatliquor-5.0 will keep the leather supple and strong. Thus, reduce the premature ageing of the leather against stiffness and cracking. The surface wear of the leather is greatly reduced with friction noise reduction. This is preventable with a rub-resistant Protector-B+ that imparts a natural buttery-feel. Periodic cleaning and rinsing with Clean-3.8 follows by Rinse-3.0 to the bare body contact areas like headrest and armrest helps reduce greasy soiling build-up. Restorative cleaning and occasional dye stains removal from new blue jeans is accomplished with Prep-4.4. Note that the mentioned product suffix number denotes its pH value in this leather-safe holistic care system.
Instruction:

Preventive Care:
A non-stick, rub-resistant protection is recommended to be in place before putting the leather to daily use. Protector-B+ imparts a soft natural buttery-feel that enhances the leather luxuriously to the sense of touch. The non-stick surface shields the leather from sticky soiling thus prolonging the high level of appearance. Rub-resistant ability reduces friction noises that translate into less friction wear. This leather-scented protector diffuses a classic leather scent that boost the sensuous leather more appealing to the leather lover. This preventive care is kept in place at each level of routine, periodic or restorative cleaning cycle. A simply spray and wipe prolongs the need for cleaning heavy soiling.
1. Mist sprays Protector-B+ spread with lint free towel and is ready for use when dry. Scentless version is available as Protector-B.
Routine Care:
Routine care includes procedures such as general dust cleaning, attending to spots and stains as required especially the pH balancing of sweat stains from shifting alkaline. Thus prevents leather from tackiness. A routine non-stick rub resistant protection after neutralizing rinse helps keep leather in a more attractive and healthy state while preventing premature wears.
1. Spray Rinse-3.0, horsehair Brush-1 agitates and towel extract until it shows clean.
2. Mist sprays Protector-B+ spread with lint free towel and is ready for use when dry.

Periodic Care:
Periodic care is recommended before soiling causes damages to the finishing. This keeps leather consistently clean and healthy at all times. Body contact areas would require more frequent attention than the unused areas. While the leather headrest and hand rest gets the most of body oil and sweat contacts.
1st phase – Periodic Care:
1. Spray Clean-3.8 and agitate with horsehair Brush-1; ensuring a uniform application over the entire surfaces a section at a time.
2. Towel extract until it shows clean.
3. Remaining residues are spray rinse with Rinse-3.0 and towel extract to a squeaky-clean.
4. Let dry and inspect for satisfaction, otherwise repeat cleaning process as necessary or proceed to hydrating.
2nd phase – Hydrating:
Hydrating is essential to relax and separate the stick together collapsing fibrous structure. Moreover, it is used to check for surface tension from blotchiness prior to fat and oil replenishing.
1. Spray Hydrator-3.3 to check for an even appearance.
3rd phase – Fatliquoring:
Fatliquor evaporates as VOC (volatile organic compound) when temperatures rises especially from exposed surfaces. Periodic fatliquor replenishing maintains the leather’s structure integrity and pliability thus strengthen these exposed leather from cracking.
1. Spray Fatliquor-5.0 in like manner as Hydrator-3.3 and let dry naturally.
2. Repeat application in between drying until saturated.
3. The leather is left for slow natural drying for extra softness.
4. Surface strays are wiped with Hydrator-3.3 to free of sticky residue.
4th phase – Preventive Care:
1. Mist sprays Protector-B+ spread with lint free towel and is ready for use when dry.

Restorative Care:
This is the ultimate restorative or salvage care system that removes accumulated soiling including aged conditioners. Accumulated soiling that fills creases is often mistaken for cracks. Using Prep-4.4 performs restorative cleaning. It works by chemical reaction to emulsify soiling through its penetrating, lubricating and suspending power. Horsehair detailing Brush-1 is recommended to worked into heavily soiled areas sufficiently to avoid excessive agitation that might damage already weaken finishes especially on heavily used areas.
1st phase - Restorative Cleaning:
1. Apply Prep-4.4 and agitate with horsehair Brush-1, ensuring a uniform application over the entire surfaces a section at a time.
2. Allow a dwell time of 10 to 30 minutes or before it dries prior to towel extraction until it shows clean.
3. Sticky residue is removed by Cleaner-3.8 with gentle brush agitation and towel extracts until it shows clean.
4. Remaining residues are spray rinse with Rinse-3.0 and towel extracts to a squeaky-clean.
5. Let dry and inspect for satisfaction, otherwise repeat cleaning process as necessary or proceed to hydrating.
2nd phase – Hydrating:
Hydrating is essential to relax and separate the stick together collapsing fibrous structure. Its surfactantcy helps check for surface tension of blotchiness prior to fat and oil replenishing.
1. Spray Hydrator-3.3 to saturate with an even appearance to soften up the leather.
2. Let dwell 10 to 30 minutes and towel extract wick up soiling until it shows clean.
3rd phase – Fatliquoring:
Fat and oil replenishing maintains the leather’s structure integrity and pliability thus strengthen these exposed leather from cracking.
1. Spray Fatliquor-5.0 in like manner as Hydrator-3.3 and let dry naturally.
2. Repeat application in between drying until saturated.
3. The leather is left for slow natural drying for extra softness.
4. Surface strays are wiped with Hydrator-3.3 to free of sticky residue.
4th phase – Preventive Care:
1. Mist sprays Protector-B+ spread with lint free towel and is ready for use when dry.