Hey everyone,

Thanks for having this forum... I read the treads all the time.. this is the first time submitting a question. so here goes.....

We are experiencing a green stain and are unable to locate the source of it.

The stain removers are not helping at all.... we are experimenting trying to duplicate it but have not had any luck...

Lilly,

Welcome to FabNet. What color is the granite? Was it sealed?

Linda

Hello Lilly and welcome! What kind of surface do you have?

 

Lilly can you post a photo of the problem ?

 

 

the colors were typhoon bordeaux grannite, golden river and siena bordeaux,santa ceclia

3 were sealed 1 was not

2 on the front edge and 2 on the deck.... I am going to try and post a picture

here is the green..... thanks for all of your help

It's an issue with an adhesive you are using reacting with the metals in the stone. Usually it's from the accelerator.

You can mix together Comet with Bleach (the powder) and denatured alcohol to a paste consistency. Apply it to the stone, cover it with plastic, and leave it for 24 to 48 hours. Clean it off with soap and water. Repeat until the stone is not green any more (it could take 3-4 applications). Then reseal the tops.

Thanks I am going to give that a try

Brian,
Are you talking about the accelerator in the CA glue? I read the first page at your link. Which of the metals would react? I would imagine the softer ones (lead?), but could harder metals do it as well?

what ever is going on there is some sort of chemical reaction most likely its form accelerator that is used with ca glue as brian said that stain will cone out its just a matter finding the rite polutice. or stan remover combination.

there is a little info missing was the counter top just installed. if not how long have you had it and when did the stain appear. if its a new install you should contact your granite guy and have him take care of it. if you have had it for a while say a year than the stain may be caused by something other than ca.

Posted By Tom M on 21 Nov 2008 10:45 AM
Brian,
Are you talking about the accelerator in the CA glue? I read the first page at your link. Which of the metals would react? I would imagine the softer ones (lead?), but could harder metals do it as well?

I really don't know if it's actually metals that are the issue. I'm just blindly repeating info that I've read in other places on the internet.

I did read once that everything on the internet is true though.


I do know that we had an issue with some material that was about the same color and through testing a small scrap piece we did determine that the accelerator was the cause.

I have had some luck removing these stains with a torch. Just be sure not to get the stone too hot.

 

Fred Hueston

stoneforensics.com

stoneprosolutions.com

 

Posted By Fred Hueston on 30 Nov 2008 11:45 AM

I have had some luck removing these stains with a torch. Just be sure not to get the stone too hot.

 

Fred Hueston

stoneforensics.com

stoneprosolutions.com

 

If a torch would work, could you use a heat gun with the same results?

Yes, I believe a heat gun usually has the same effects. Do they get as hot as a torch though?

I've also heard that over time the blue/green spots will go away on their own but we're talking about months and most customers aren't that patient.

have not tried a heat gun.  If you do and it works let us know.

the big miss conception about stone is that it stains it does not it absorbs it is pours. heat can and does work BUT!!!! if the area that is affected has ca to fill a pit of or a chip the heat will most likely pop out that filled area. and than your back at square one the heat may or may not remove the stan but for sure it will remove the filled area if in fact it is filled. in this case i'm sure there is some ca in there some where

if you are patient the best way is a polutice it will draw the stain out of the stone

I don't mean to intrude, but after talking to a chemist a few years ago. I was told to break the stian down to its base and if it is ca glue then you may need to start with a ca solvent then remove the stain when it is broken down. If it is a reaction to the metals in the stone then you may be able to remove the metals with an acid. Note both of these are severe tactics and should be tested before you end up with your pants down in a customers home.

3d, that is the second time you have been thoroughly polite in your posts. I'm warning you, that kind of proper behavior will not be tolerated around here.

(just kidding)

Welcome to this side of FabNet. Somewhere around here is the "Introduce yourself" room. If you can find it, or if someone less of a moron than me can find it for you, introduce yourself there.

Looking forward to reading what you have to say.

Tom

"Pants down in a customers home" 
I thought that only happened to the pool and grounds keeper.