Davidson- Semi analine Ottoman

This is the only matching piece in the room, she uses it as her Dog ottoman. The stain you see present is from dog Vomit, She tried to use Mothers Leather cleaner. The effected area is stiff (starting to denature). I she does not want to spend the money to restore it, she is just hoping it can look a little better, and to make sure the area will not get worse and blow open into a hole. I was going to prep clean 4.4 the top, let it sit for the rest of today, and then clean it in a couple hours. After I will begin to Hydrate, Fatliquor and cover. If there is something else I should do to prep the leather please let me know.

Thank you,

Mike Sadowski

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>>> The effected area is stiff (starting to denature).

Leather is a combination of an amphoteric rawhide and the non-amphoteric leather constituents like the tanning agents, dyestuff and fatliquor.

Leather has a pH value of 3 to 5.

Any solution pH value higher than 7 will cause a denaturing of the leather where the non-amphoteric leather constituents leaches out. When the leather is stiff, it is fatliquor related. When the leather feels sticky or slimy it is tanning agent related and color bleedings is dyestuff related.

Because high pH value causes the amphoteric leather protein fiber to shift ionic negative (-ve), it breaks hydrogen bonds with the other ionic negative (-ve) leather constituents, behaving like magnets “like poles repels”.

It will require a low pH value cleaner to charge the amphoteric leather fiber ionic positive (+ve) below the leather pH neutral, or iso-electric point or pI to attract the leach out leather constituents from surrounding areas especially the tanning agents. Fatliquor will need to be top-up as there are volatile and evaporates away besides leaching out.

Solution to this problem will require CleanPro-1.5 with a pH value of 1.5. Note the pH very is very low but still save on our hands, unlike typical acidic solutions.

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http://www.leatherdoctor.com/cleanpro-1-5-2/
CleanPro-1.5 (pH 1.5) is a water-based restorative cleaner with an extra protonating or pH balancing function. The amphoteric leather protein fiber ionic positive (+ve) attraction in most cases need to be charged up to attract the other ionic negative (-ve) leather constituents more effectively like the tanning agent from denaturing or reverting to rawhide, stabilizing migrating dyestuff from bleeding, and fatliquor (fat and oil) from breaking hydrogen bonds or leaching that result in stiffness that leads to cracks. In a system to rectify leather denaturing from turning sticky or slimy Acidifier-2.0 is used as rinse. Hydrator-3.3 is used to redistribute the tanning agents back to the expose areas and Fatliquor-5.0 to supple up the leather when dry. The purpose of this low pH value of 1.5 (CleanPro-1.5) is to revert the leather from denaturing or reverting to rawhide, however other associated leather constituents need to be replenished accordingly.
Application Instruction:
1. Dry soil removal prior to application.
2. Spray CleanPro-1.5 and agitate with horsehair Brush-1 and towel extract until it shows clean.
3. Spray Acidifier-2.0 and agitate with horsehair Brush-1 and towel extract until towel shows clean.
4. Proceed with Hydrator-3.3 to relax and separate the stick together fiber structure and dwelling it up to 72 hours helps to redistribute the surrounding leather constituents back to the exposed areas.
5. Fatliquor-5.0 commences topping-up the difference to 14% (fat and oil) when dry.
6. Leather is ready for further refinishing accordingly.