Veg-Tan Leather Chair with Sweaty Stain.

[Question]

Hello,

I sat in my vintage chair with sweaty pants on and I need help.

I actually don't mind some of the stains but this one bothers me.

Here are pics.

Thanks!
Jessica


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#3

[Roger Koh]

Here are some important tips that I am sharing with you.

* The most important fact to know is that veg-tan leathers are fatliquor (fat and oil) thirsty, that is to say, the original fatliquor content has diminished and the leather when wet and dry again without sufficient fatliquor content is replenished or reconditioned, the existing micro crazing or cracks may be magnified.

The important point to take note of is that the 4 product sequence has to be continuous keeping the leather structure wet starting with Vachetta Pro-1.2 > Acidifier-2.0 > Hydrator-3.3 > Fatliquor-5.0. It is after a repeat replenishing of the Fatliquor-5.0 until the leather absorbs no more, that the leather is allowed to have a slow natural drying. The longer it takes to dry the the safer the leather is free from accelerated cracking. Any surface Fatliquor-5.0 residue to wipe clean with Hydrator-3.3. And leave to dry again preparing for Vachetta-2.8 treatment.

Vachetta-2.8 is then used to spray over the darkening stain and feather out to the entire section without leaving a dry area for a Redox (oxidation-reduction) reaction to take place.

I believe you have to pay attention to possible cracking due to your leather being too dry. It is the 'Van der Waal' phenomenon at work beyond our control, but we can minimize the effect of cracking with slow drying and topping up the fat and oil content up to 14% when dry.

Any questions you may have?


https://leatherdoctor.com/vachetta-l...emover-kit-v3/

Vachetta Leather Cleaner, Conditioner, and Browning Remover Kit V3 by Leather Doctor cleans general soiling, rejuvenates suppleness, and removes browning discoloration.

People Also Ask:

What is Vachetta Leather?

Vachetta leather is vegetable-tanned and the pale biscuit coloring comes directly from the vegetable tannins and the skin itself, without additional coloring or finishes, just naked and natural made popular by Louis Vuitton bags.

Why does Vachetta Suntan?

Vachetta behaves just like our light-colored skin and gets a suntan when exposed to sunlight, in contrast with other aniline-dyed leathers that fade. Lightening the suntan is performed with a reduction-oxidation reaction treatment.

Why does Vachetta easily Develop Browning Discoloration?

Vachetta easily develops browning discoloration due to its pH sensitivity to alkaline solution and when neglected often suffers unsightly browning stain marks from a variety of liquid sources. Even apparently clean rain or tap water often leaves a lightning spot with an outer ring. The pH 7 alone of water will often cause a rippling effect on the tannin that destabilizes and causes it to migrate. The higher the pH value above water the darker the browning stain becomes, a common mistake with baking soda.

How to Correct Vachetta Leather Browning Discoloration?

Vachetta leather browning discoloration correction is performed in two stages, a pre-cleaning, and a post-treatment. A pre-cleaning first is soiling removal in combination with pH balancing the leather structure improves the appearance and returns the pH chemistry integrity to its original pH neutral of between 3 to 5. When pre-cleaning becomes satisfactory it is essential that the leather fatliquor conditioning continues while the leather is still damp and terry towel extraction shows dry. Due to the physic of the 'Van de Waal' phenomenon, when leather is wet and dry again without sufficient fatliquor fat and oil to separate and lubricate between them, the fiber shrinks and becomes stuck together, and when flex cracks. A post-treatment with oxidation-reduction reactions is performed after the leather is fatliquor conditioned sufficiently to about 15% of fat and oil content when dry.

How to Control Vachetta Leather from Crackings?

Vachetta leather that is aged, dried, or cracked should first be fatliquor conditioned to regain softness with strength before an oxidation-reduction reaction treatment to reverse unwanted browning discoloration. This fatliquor conditioning precaution is to prevent any further cracking accelerated to the leather when dry. Due to the 'Van der Waal' phenomenon in the drying process, empty or insufficient fat and oil in the leather fiber structure are likely to result in stiff leather as the fibers become stuck together. Slower natural drying will reduce the stiffness and ill effects from the lack of fat and oil.

How to Control Vachetta Appearance in pH Balancing and Redox Process?

To control a resulting even appearance always feather out from the area of browning discoloration to the edge of the panel and extend to the entire article. Achieving an even saturating appearance with soaking products will also translate into a dry even appearance. Redox or oxidation-reduction treatment is always the last process after the leather is well conditioned with fatliquor. In mild cases cleaning with a low pH of 1.2 and rinsing with a pH of 2.0 is sufficient to remove most rings and brown water spotting. Browning caused by a higher pH value or sun tanning will then need a redox reaction treatment that follows.

How to Control Vachetta Softness with Strength?

Vachetta leather, unlike other tanning types, by vegetable tanning is more susceptible to stiffness and cracks as it is characteristically more fatliquor thirsty. Cracking leathers are handled with care during the dry inspection and repeat fatliquor conditioning each drying cycle water evaporates until the leather takes no more and is left to slow dry. Surface residue cleans up with a hydrator and massage when almost dry produces a softer and stronger leather.

How to Control Vachetta Structure Absorbency?

Vachetta structure absorbency is controlled by the amount of fat and oil in the leather structure. Since fat and oil is VOC or volatile organic compound, it evaporates with aging and heat. These empty spaces become absorbent from any liquid stains. Keeping Vachetta periodic fatliquor conditioned not only reduces absorbed stain but prolongs the life of the leather, as fatliquor is the lifeblood of leather.

How to Control Vachetta Surface Scuffing?

Vachetta leather is naked and unfinished and easily scuffed, sealing the scuff and concealing scuffing repairs is performed with a draggy feel and non-stick surface protector.

How Fatliquoring Works?

Fatliquoring works by preconditioning the leather structure relaxing and separating any stuck-together fibers plumping it with softness and allowing free water movements ready to receive fatliquor conditioning. In a bottle, 5/6 of the fatliquor water contents will evaporate and only leave 1/6 of the remaining fat and oil in the leather structure. The fat plumps the leather with fullness, and the oil lubricates the fibrils like millions of interlocking hinges for sliding over one another for suppleness with softness and tensile strength from tearing. Fully saturated fat and oil with breathing pores when dry make the natural leather less absorbent to any liquid stains. Fatliquor surface remnants that shine when dry are removed with a hydrator turning it milky and reabsorbed into the leather to clear is the end of the fatliquoring process. Slow drying will produce a softer leather and flexing or massaging it while almost dry also helps in extra desired suppleness.

"Why these Products are Handpicked as a Holistic System to Remove Browning on Vachetta Leather?"
The answer is . . .

Vachetta Pro Cleaner-1.2 and Acidifier-2.0 system!

Vachetta Pro Cleaner-1.2 is a dual-purposeful low-pH heavy-duty cleaner and low-pH conditioner to remove surface soiling and rectify surface pH imbalance to remove browning rings and blotchiness. Leather Acidifier-2.0 is a pH 2.0 leather acidifier rinse and pH conditioner working in sync with Pro Cleaner-1.5 to control Vachetta browning discoloration.

Hydrator-3.3 and Fatliquor-5.0 system!

Hydrator-3.3 is a water-based pH 3.3 relaxer conditioner used before a fatliquor conditioner and a surfactant cleaner to remove surface remnants thereafter. Fatliquor-5.0 is a pH 5.0 ionic negative (-ve) charged micro-emulsion of fat, oil, and water conditioner for softening Vachetta leather when dry.

Vachetta Redox Cleaner-2.8!

Vachetta Redox Cleaner-2.8 is a pH 2.8 oxidation-reduction reaction cleaner for the lightening oxidation and sun tanning effect.

Leather Protector-D!

Protector-D is a protective conditioner with a draggy feel that is also a scuff repairer filling and concealing surface scuffs to improve appearance.

Why Products in Concentrates?

Concentrate product has an indefinite shelf life, does not freeze, have less handling damage, and save cost on shipping weight.
Concentrates in the bottle have to be cut/mixed with distilled water before use.

How to Work with Pro Cleaner-1.2 and Acidifier-2.0 system!

1- Pro Cleaner-1.2 is sprayed and worked with a lint-free folding towel with detail brushing accordingly and feathering out to the edge of the panel changing folding sides as soiling shows. Even product absorption is observed to achieve an even appearance when dry.

2- Acidifier-2.0 is sprayed and worked by the same method accordingly
and towel extraction until the new folding sides show clean again and dry with even out appearance before fatliquor conditioning.

How to Work with Hydrator-3.3 and Fatliquor-5.0 system!

1- Hydrator-3.3 is sprayed and worked by towel padding and brushing accordingly with towel extraction until new folding sides show clean.

2- Hydrator-3.3 is again applied to plump softness and the leather creases, wrinkles, or stiffness if any is staked, massaged, or flexed to satisfaction and towel extraction until new folding sides show dry.

3- Fatliquor-5.0 is sprayed, towel padded, and brushed into the leather to plump softness and let it dry.

4- Fatliquor-5.0 is repeatedly apply each cycle the water content dries until the last application when the leather absorbs no more that ends the repeat application, and the leather is left for slow drying.

5- Fatliquor-5.0 remnant if any is driven into the leather or wiped off with Hydrator-3.3 and left to dry before redox treatment.

How to work with Redox Cleaner-2.8?

1- Vachetta Redox Cleaner-2.8 is sprayed over the dried surface and towel padded saturating evenly without a dry edge to avoid blotchiness or drying marks and left to dry for an oxidation-reduction reaction to take effect.

2- The appearance is inspected during damping or after drying and treatment may repeat accordingly.

3- Any surface drying residue is wiped away with Hydrator-3.3 and let to dry again for a satisfactory inspection, otherwise repeat.

How to work with Leather Protector-D?

1- Leather Protector-D is sprayed and spread out with a lint-free towel let dry and the leather is ready to use.

Your Questions are Welcome!


Roger Koh
Leather Care System Formulator
Consultant / Practitioner / Instructor / Coach
web: www.leatherdoctor.com
forum: www.leathercleaningrestorationforum.com
email: [email protected],
email: [email protected]
phone: 604 773 1878