Author Topic: How to remove permanent marker from yellow Fluke rubber case?  (Read 20113 times)

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Offline WartexTopic starter

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I bought some gear on eBay and it has writing on it on the yellow rubber case. I tried 10 diff chemicals but the yellow rubber seems to be deeply saturated with black marker. I took my oscillating sander to it to measure the depth of penetration. Lo and behold, the ink was as deep as 1mm in the rubber. So remember kids, if you write on your DMM, there is no [unnecessary inappropriate word removed] way it's coming off. My plan is to use UV light to see if I can break down the marker paint.

Does anyone have any experience on how to remove the permanent marker out of that yellow rubber?
« Last Edit: July 24, 2011, 03:07:34 am by Wartex »
 

Online ejeffrey

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #1 on: July 23, 2011, 08:53:44 pm »
Excessive UV might do more damage to the rubber than to the ink.  Probably you should just learn to live with it.
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #2 on: July 23, 2011, 09:05:35 pm »
Excessive UV might do more damage to the rubber than to the ink.  Probably you should just learn to live with it.

My OCD will kill me if I don't remove it.
 

Offline Kiriakos-GR

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #3 on: July 23, 2011, 09:05:38 pm »
Is this holster made by Fluke ?
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #4 on: July 23, 2011, 09:06:23 pm »
Is this holster made by Fluke ?

Yes, it's the same yellow rubber casing you have on any Fluke multimeter.
 

Online ejeffrey

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #5 on: July 23, 2011, 09:07:19 pm »
Dye the whole boot black?

Get a replacement?
 

Offline Kiriakos-GR

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #6 on: July 23, 2011, 09:36:18 pm »
Is this holster made by Fluke ?

Yes, it's the same yellow rubber casing you have on any Fluke multimeter.

Ok, I think that I have one crazy suggestion for you, it looks that you did try all the logical ones, all ready.

Get a big bowl with hot water at 45C .
Set it in for 10 minutes to get really hot.

Take it off and wash it with shampoo for dish washing, soft moves like doing massage to it.
keep doing it for three minutes.

Check the results.

If nothing happens, you move to step No2.

Again in fresh hot water 45C  for another 10 minutes,
but now when it will get hot again,  you will have one cloth really soaked with purified alcohol ( The expensive one).
Set the cloth on it and let it for five minutes, Yes you have to hold it on the spot all that time.
And in all that time you have to gently push the cloth on the holster,  like the cloth to was some sort of pump.
No rubbing !!  just push it in and release.

If you do it with style ..  :)    you will get some results back.

 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #7 on: July 23, 2011, 09:54:38 pm »
I tried both, it's has fainted to 50% of it's brightness from other chemicals and abrasion but not beyond that. I need something that breaks down that black paint.
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #8 on: July 23, 2011, 09:55:49 pm »
Dye the whole boot black?

Get a replacement?

I'm thinking of coloring it black. Which brings us to an interesting question, does fluke sell those yellow cases separately?
 

Offline grenert

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #9 on: July 23, 2011, 11:43:00 pm »
Saturation reported cleaning the yellow covers in the dishwasher:
https://www.eevblog.com/forum/index.php?topic=3415.0
 

Uncle Vernon

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #10 on: July 23, 2011, 11:48:17 pm »
Prep-Sol cleaning solvent works. I wouldn't be using it too often and expecting the rubber to keep it's integrity. But yeah its worked for me a few times, and rumours to the effect I wished to murder those responsible remain rumours.  ;)
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #11 on: July 24, 2011, 12:01:04 am »
Saturation reported cleaning the yellow covers in the dishwasher:
https://www.eevblog.com/forum/index.php?topic=3415.0

Trust me, it's 1mm deep in rubber, no dishwasher in the world would get it out.
 

Offline Kiriakos-GR

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #12 on: July 24, 2011, 12:16:44 am »
No more tips.. show to us a picture of it .
 

Online Mechatrommer

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #13 on: July 24, 2011, 01:00:49 am »
Dye the whole boot black?
1mm deep penetration? dishwashing not working? yeah! this is the solution. if you dont want to paint the whole, overlay it with fancy shapes like stars, sky or telletubbies.
and can someone make the correction to the topic? it sounds funny.
« Last Edit: July 24, 2011, 01:05:50 am by Mechatrommer »
Nature: Evolution and the Illusion of Randomness (Stephen L. Talbott): Its now indisputable that... organisms “expertise” contextualizes its genome, and its nonsense to say that these powers are under the control of the genome being contextualized - Barbara McClintock
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #14 on: July 24, 2011, 01:44:26 am »
No more tips.. show to us a picture of it .



« Last Edit: July 24, 2011, 01:49:22 am by Wartex »
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #15 on: July 24, 2011, 01:52:40 am »
and can someone make the correction to the topic? it sounds funny.

Thank you for asking the moderator to edit my post because it's *personally* "funny" to you. Do you order around like that all the time, or just when you are on your high horse?
 

Offline Kiriakos-GR

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #16 on: July 24, 2011, 02:13:40 am »
There is no need for pillow wars.

The high grade alcohol ( with clear color for medical use ) it should had remove it.
In the worst scenario high grade alcohol + an metallic sponge ( dish washing).

You last chance is to get an special spray called as ink remover, I was using it when I was repairing cashiers.
The cashiers was using ribbon tapes soaked with ink.
The punching needles in the printing head, needed occasionally a good cleaning, as the ink and the dust of the paper,
was creating a sticky cream that was blocking the operation.


 
   
 

Online Mechatrommer

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #17 on: July 24, 2011, 02:18:40 am »
and can someone make the correction to the topic? it sounds funny.
Thank you for asking the moderator to edit my post because it's *personally* "funny" to you. Do you order around like that all the time, or just when you are on your high horse?
if you intentionally do that, just say it and the reason. there are 7bil human on this planet which not only you and me. i dont mind if its "markez" or something else other than "market". but then this is not my blog who cares?
Nature: Evolution and the Illusion of Randomness (Stephen L. Talbott): Its now indisputable that... organisms “expertise” contextualizes its genome, and its nonsense to say that these powers are under the control of the genome being contextualized - Barbara McClintock
 

Offline Kiriakos-GR

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #18 on: July 24, 2011, 02:32:42 am »
but then this is not my blog who cares?

We all care about this forum, and the topic it should be moved to the General chat too.  :)
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #19 on: July 24, 2011, 03:06:17 am »
He could have pointed out that I made a typo in the topic title, because I can edit my own posts.

PS: Kiriakos, thanks for the tips. BTW it's very difficult to get real alcohol in north america.
« Last Edit: July 24, 2011, 03:09:06 am by Wartex »
 

Uncle Vernon

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #20 on: July 24, 2011, 03:08:23 am »


If that's the solution best never consider getting a tattoo  :D
 

Offline WartexTopic starter

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Re: How to remove permanent market from yellow Fluke rubber case?
« Reply #21 on: July 24, 2011, 03:10:33 am »
If that's the solution best never consider getting a tattoo  :D

Tattoos being covered by new tattoos with solid coloring? That's unheard of! /sarcasm
 

Offline Psi

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Re: How to remove permanent marker from yellow Fluke rubber case?
« Reply #22 on: July 24, 2011, 03:37:35 am »
It's a bit aggressive but.. 1000grit sandpaper and then polish it up again.

You risk losing the shine forever or it becoming rough. but at least it should remove all the black, then you can worry about the next step, getting it smooth again.

Worst case you can sand everywhere, over the entire case, and it will look uniform and somewhat normal.
« Last Edit: July 24, 2011, 03:39:29 am by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline WartexTopic starter

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Re: How to remove permanent marker from yellow Fluke rubber case?
« Reply #23 on: July 24, 2011, 03:48:36 am »
It's a bit aggressive but.. 1000grit sandpaper and then polish it up again.

You risk losing the shine forever or it becoming rough. but at least it should remove all the black, then you can worry about the next step, getting it smooth again.

Worst case you can sand everywhere, over the entire case, and it will look uniform and somewhat normal.

As I said in the first post, i DID remove 1 mm layer of rubber by sanding it, and the ink was still there! The ink soaked almost ALL THE WAY thru the rubber, to the other side. It is not a simple surface stain.
 

Online IanB

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Re: How to remove permanent marker from yellow Fluke rubber case?
« Reply #24 on: July 24, 2011, 04:03:55 am »
If the ink has soaked all the way into the rubber, you have only two choices. Either flow the ink out by diffusion (like chromatography), or bleach the color away. I think I would try bleach first as it's easier; try hydrogen peroxide first, and chlorine bleach second. You would have to soak it in bleach overnight and see what happens.

If bleach doesn't work, you need to place the ink surface against an absorbent material like a wad of paper towels and then apply solvent to the back surface so it soaks through into the towels and carries the ink with it. You will need a solvent with small molecules and good dissolving power; you might try acetone or methanol (which is poisonous by skin absorption--wear gloves and don't breathe the fumes). If the ink has bonded to the rubber molecules this won't work. There is a reason it is called permanent marker.
 


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