davidcorner
Member
Bath Brass And PVC Fittings http://www.eastmanceramic.com/bath-fittings1.htm
Posts: 2
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Post by davidcorner on Jul 1, 2014 2:57:52 GMT -9
My backsplash was just finished and when it was grouted I noticed a lot of pits (like someone took an icepick to it) on several of the tiles. Some of the tiles look perfect but some of the tiles have half a dozen pits in a single tile. Some have one or two pits. I don't know if the tiles arrived like this or if it just became noticeable after the grout was put in because the whiteness of the grout got into the pits making them more noticeable.
I know that marble is soft however I didn't expect the tiles to start off pitted and dinged right at install. Do these kinds of tiles come like this or do you think they got damaged by people banging tool boxes or something into the tiles (or somehow by the tiler banging into them somehow)?
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Post by dungeonmistress on Jul 1, 2014 8:10:47 GMT -9
I know something about marble, but can't really tell without a picture. If you could take a close-up picture of your tiles, I might be able to tell if it's damage or nature.
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Post by wyvern on Jul 1, 2014 9:29:47 GMT -9
Given that a major constituent of marble is calcium carbonate (because marble is just geologically heated limestone rock; "lime" here = calc. carb.), even weak acids can attack the surface sometimes, which can cause pitting. However, stone-workers have a tendency to call any lime-rich rock "marble" sometimes, regardless of whether it's a true "geological" heated marble or not. Such "true" marbles tend to be more resistant to acid attack (because the minerals have at least partly melted and recrystallised, sometimes recombining with other chemicals in the rock), but as Dungeonmistress said, it does really depend on the nature of the rock involved, as every marble is slightly different from the next.
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Post by dungeonmistress on Jul 1, 2014 11:35:33 GMT -9
Well put, wyvern. Very informative. I grew up with lots of beautiful antiques from the Louis XV and Louis XVI periods out of France. They used Marbles of all sorts during that period for table tops, dressers, cabinets, and more. We had several of these pieces in my home when I was growing up, white marble, black marble, golden marble, green marble and my mother's favorite: pink marble (not the light petal pink you might think of, but a deep, almost blood red color that they still called pink). It was my job to care for that marble, dust clean and polish, everyday. So, if you can, davidcorner, post some pictures of your marble and, between wyvern and myself, we should be able to tell you something about it.
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