[Roger Koh]

“Top job.
I think a job like that is best left to the experts.
It's gaining that level of technical expertise that is the problem.

Simon”


from: http://www.cleanitup.co.uk/smf/index.php?topic=98366.0



Do you think that this job was done by “experts” too?


This is what happens when baby wipes were left on this leather for too long.


Brown Ring Problem solved!


Roger Koh
Leather Doctor®

[Jim_77]

Solved by taking a photograph with the light shining off it, Genius!

[gwrightson]

got to admit it neil,

I agree with you because if you look you can actualy still see the ring , maybe a pic from same angle will give a better veiw Roger!!

It does look improved but not solved.
Geoff

[robert meldrum]

First time I've seen you post a duff result Roger or is something to follow ?

[Roger Koh]

Thanks to Jim sharp eyes!

I have requested this home owner to provide better pictures without the flash… see our emails:



I'll have to try tomorrow - the room is too dark to get a picture without the flash right now. Thanks again for your help.
Charles

On Jun 11, 2010, at 9:23 PM, Roger Koh wrote:

> Dear Charles,
>
> Do you have another picture to show the final result without the
> flashing glare?
>
> I appreciate if you can post it to the forum.
>
> Roger Koh

[Roger Koh]

got to admit it neil,

I agree with you because if you look you can actualy still see the ring , maybe a pic from same angle will give a better veiw Roger!!

It does look improved but not solved.
Geoff

I agree; if all taken at this angle would be better…more pictures to follow!

#1


Roger Koh
Leather Doctor®

[Roger Koh]

These pictures show work-in-progress and inspections…while still waiting for final pictures!

#2


#3


#4


#5


#6


#7


Roger Koh
Leather Doctor®

[Simon Gerrard]

Roger,

I was referring to the 'top job' you did  on the suede chairs - a job I would leave to someone far more skilled in these matters than myself.

Simon

[Shaun_Ashmore]

What's happening Roger? is it drawing the colour out?

Shaun

[Roger Koh]

What's happening Roger? is it drawing the colour out?

Shaun

Yes some sort of "drawing the colour out"...


First the alkalinity and alcohol content of the baby-wipe has caused the protein leather structure to shift anionic (-) on the affected area.

Thus the leather constituents which are also anionic (-) in nature to break bonds with the protein fibers (based on the principle of “like poles repel”).

The dyestuff, fatliquor besides others becomes fugitive and moves away from these alkaline and alcohol contents from the baby-wipes and reforms at the edge of this foreign contamination as ring.

To rectify these fugitive dye and fatliquor ring problem requires corrective measures.

1] The alkalinity exposure need to be neutralized to return the protein fibers back to its cationic (+) originality; by using a pH 2.0 leather Acidifier.

2] The ring of fugitive dyestuff and fatliquor need to be moved back and foreign contamination need to be move out; this movement of colloid within the leather structure (averaging from 0.9mm to 1.5mm) requires the working power of a pH 3.3 Hydrator; thus soaking the leather structure and wrapping up to slow evaporation is the key to the internal structure leather constituents redistribution working process.

3] Exhausted fatliquor that has been weaken and leached out requires to be replenished; that partially contributed in the evenness of appearance with a pH 5.0 Fatliquor.

Only three products is involved up to this stage; Acidifier, Hydrator and Fatliquor.

Do not forget, this job is done by the home owner that can’t find a competence leather service provider.

But knows how to “Google” for information and found the leather cleaning restoration forum.

Roger Koh
Leather Doctor®

[Shaun_Ashmore]

So step 1 is more of balancing the ph so more of invisible mending?

step 2 is more visual and is applied to all of the cushion not just affected area and is drawing out the stain into the tissues which are wrapped around the cushion.

step 3 is more of a rehydration to put to like new.

How long does the process take?

Shaun

[Ian Rochester]

Roger,

That is an impressive result on aniline, especially if it was done by the customer and not a trained person.  Aniline is always a difficult product to repair sympathetically without totally changing the texture and appearance of the leather.

What's happened to your website? just tried getting onto it and it's "under construction"

[Roger Koh]

How long does the process take?

This is a result orientated task!

Time is a necessary component of this working process!

If the entire cushion is leather-safe hydrated through the suede side; I would leave it to dwell 1 to 3 days.

The luxury of time will facilitate the sorting itself out of expelling the foreign contamination to the extended leather surface (see picture #3) and redistributing especially the dyestuff and fatliquor back to the affected area.

Roger Koh
Leather Doctor®

[Roger Koh]

Roger,

That is an impressive result on aniline, especially if it was done by the customer and not a trained person.  Aniline is always a difficult product to repair sympathetically without totally changing the texture and appearance of the leather.

What's happened to your website? just tried getting onto it and it's "under construction"

“Here is another "after" picture with less glare/no flash:”




By the way…about the website…although it says “under construction”…is yet to be constructed.


Roger Koh
Leather Doctor®