[Roger Koh]

Is this charring related to chemical burning by the urine, similar to hide burns by dung ?? in which case I would probably look at sanding the affected areas.

Thanks,

Shorty.

You are quite right, very similar yet different.

Anyway, what’s the smell of dung…ammonic?

pH of ammonia can goes beyond the pH value of 11, again depending on concentration and duration of exposure.

The pH of leather can be as low as 3, averaging from 3 to 5.

Surely it’s due of alkaline overexposure that causes the leather to have this charred effect.

So be caution when use alkaline based leather cleaners; otherwise it’s recommended to be pH neutralized to the leather acidic pH neutral of 3 to 5.


Sanding the affected areas is also a right approach to a limit, as the more is sand the coarser the grains become.


How it’s done is seen in these pictures.

Example of fatliquor application to "shrunk" marks with continuous application to saturate in between drying and erasing wick-up soiling particulates at drying intervals with a leather eraser.


Example of leather eraser removing wick-up soiling particulates when crispy dry; this repeated wet and dry cycle of fatliquor replenishing and erasing is the recommended proven method to rectify the leather shrinkage and reduce the darkening effect; it’s the rejuvenating process for leather suppleness with softness and strength from unwanted stiffness and from further cracking.



Think about all the leather types and problems that we have walk away, can now be easily done by the owner himself.

Just image “Google it” aniline urine kit, and the show maybe over for us professionals; when we do not keep up with the latest technology!


Roger Koh

[K.O. Glanville]

Thanks Roger, you have enlightened me greatly once again.

I'm off to Sydney for a few days so will be in touch after I get back.

Thanks for sharing your wisdom once again.

I think I'm becoming a leather junkie. 

I'm somewhat amazed that more people, especially in the U.K. where there is so much leather, didn't become more involved in this exercise. 

Or is it maybe because of other prominent U.K. leather technicians that teach courses and sell products. ??

I believe that there are many over there, I have seen many helpful posts from several.

At least with this type of posting, one gets easily understood answers, (and thought provoking questions that make one think), combined with pics on-the-go.

Anyhow, gotta an aeroplane to catch.

Ooroo,

Shorty.



PS::: 50% of the Rog; & Shorty show.