It is very strange. I am told it is blue-black slate, and we have worked on a fair amount of it around here (they quarry it nearby) and have not run into this problem. Also, this is the softest I have run into. Maybe it is some sort of soapstone, but I don't thinks so.
B
On Thu, Oct 20, 2011 at 4:45 PM, stuart rosen <mail@stoneshine.com> wrote:
Is the slate even porous-It sounds like something moisture could do but it is a countertop.If the linseed oil penetrated,it wouldnt have been easy to remove-blue black slate can be very dense like roofing quality. The color enhancer is acting like a topical and if the white marks are within the stone maybe they belong there.Could it be soapstone? We did a grey/(black after we loaded it up with mineral oil) soapstone that had these white marks within the stone?On Thu, Oct 20, 2011 at 2:51 PM, Fred Hueston <fhueston@gmail.com> wrote:did you check the stone for moisture..It sounds like you could have a moisture problem. If thats the case the spots will continue to come back--
On Wed, Oct 19, 2011 at 6:43 PM, Baird Standish <bairdstandish@gmail.com> wrote:
Hi. We recently touched up a blue-black slate counter that the owner had been treating with linseed oil. The linseed oil created a heavy build up, which we removed and then applied a color enhancing impregnating sealer. The result was great. However there were some white rings and spots that were in the stone (within the stone, not on the surface - like stun marks in marble). After a couple of weeks the white spots are coming back and I am going to apply a little more of the impregnating sealer to see if that subdues them. But I am wondering if there is some sort of treatment I can use on these little areas that will be more permanent and will not require constant touch up.
Thanks much.
Baird
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Baird Standish
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Facility Specialists, LLC
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Frederick M. Hueston PhD
www.stoneforensics.com
www.stoneandtilepros.com
Recommended stone care products http://www.stonecarecentral.com
Many of my articles can be found at www.stoneandtilepros.comListen to my radio show www.blogtalkradio.com/drfredoffice 321 514 6845See my specialty products at www.godrfred.com
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--
________________________________________
From the desk of
Baird Standish
Managing Partner
Facility Specialists, LLC
1616 Walnut St.
Philadelphia, PA 19103
Phone: 215-732-7505
Fax: 215-546-9160
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