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Questions!
03-06-2015, 03:38 PM
Here is the Flexsteel sofa.

I'll mail a sample out tomorrow.

It was a pleasure speaking to you today.

I want "good" patina! ;)

Thank you for your expertise!

I just mailed you the sample this morning.

Please e-mail me when you receive it.


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Roger Koh
03-06-2015, 04:28 PM
>>> Please e-mail me when you receive it.

Sample received is Aniline dye through with both side having almost identical color.

Leather further goes through a boarding process to create this “Pebble Grain” that gives extra softness and texture effect.

Thickness of leather is 1.8mm thicker than the normal aniline leathers average 1mm.

Fatliquor moisture content reading is less than 1% from the standard optimum of 14%.

pH reading is 6.2 from the average of 3 to 5.


>>> I want "good" patina!

A good patina would be seen as spot tested 3, 4 and 5 with a different in contrast with the higher grain darker and the lower groves lighter with Aniline-76 matching color.

Spot 7 using OilEffect-2.8 on spot 7 only saturates the intensity of the appearance.


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OilEffect-2.8 used to apply to a corner of the sample.


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When dry the same spotted corner lightens.


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Compare with the corner spot again 7 and 1 by Aniline-76 Antique Yellow Brown.

1, 2, 3 & 4 test spot is by layers thus 1 = 1 layer and 4 = 4 layers.

Spot 6 is done with more and heavier coating allowing the dyestuff to flow down into the grooves and creases to create a lively contrast.

Spot 5 is done with 1 part of Thickener-4.8 with 9 parts Aniline-76 to have a more even tone as desired.

Let me know what you think?


Roger Koh
[email protected]



Kit-A7.cl is recommended for this holistic restoration project.

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http://www.leatherdoctor.com/kit-a7-cl-aniline-leather-dye-refinishing-kit/
Leather Doctor® Kit-A7.cl, aniline leather dye refinishing kit is designed for dyestuff and topcoat refinishing from the simple sunlight fading to the severely sweat damages from body oil and grease. Most severely penetrated, prolonged and neglected stains show a darkening effect with a sticky feel have its topcoat and dyestuff probably deteriorated by the sweat. When the stain feels sticky, it is a sign of leather denaturing and reverting to rawhide from breaking of bonds with the tanning agent. When sign of color is transfer to a white towel, it indicates that the dyestuff has also break bonds with the protein fiber. When leather is stiff or shows signs of whitish residue migrating, it shows that the fatliquor is breaking bonds as well with the protein fiber. The main component of the leather protein fiber is amphoteric while the other constituents are not; shifting of the pH mainly caused from sweat to alkalinity affects the pH imbalance. To revert from denaturing into rawhide prior to topcoat refinishing, contaminated alkaline soiling is removed with Degreaser-2.2, a waterbased (pH 2.2) multifunctional degreaser that emulsifies greasy contamination besides controlling dye bleeding and charging the protein fiber ionic positive for strengthening the attraction between the ionic negative tanning agent, dyestuff and fatliquor. Deflocculated and suspended soiling is towel extracted, thereafter rinse and pH balanced with Acidifier-2.0 to prevent the leather from reverting to rawhide. When leather feels sticky or slimy it is a sign of leather denaturing, a squeaky feel when wet is a sign of a healthy leather. Hydrator-3.3 relaxes stiff leathers and removes surface tension free from surface blotchiness prior to fat and oil replenishing. Fat and oil is replenished with Fatliquor-5.0 to rejuvenate the leather for the desired suppleness when dry. Custom redyeing commences prior to topcoat refinishing. Protector-B+ imparts a non-stick rub-resistant protection with a buttery-feel that shield against sticky soiling and reduce friction noises. Note that the mentioned product suffix number denotes its pH value in this holistic leather-safe aniline leathers dyestuff and topcoat refinishing system.