bad marks on stone

[jonnyc]

I've had similar happen and in my case it was dust from the builders that had settled on it in a damp atmosphere and almost appeared to etch itself onto the tile. Mine came out with cleaners though, so a bit stumped in your case!

Could be this .some one else also mentioned tannin.

 

[Concrete guy]

Well lets hope they eventually even out.

They could actually be re brushed. That's what these are for:-

 

[jonnyc]

Can you re brush just parts of a stone and when Doing so does it take a fraction off the surface.what do you attach the bits to

 

[Concrete guy]

Can you re brush just parts of a stone and when Doing so does it take a fraction off the surface.what do you attach the bits to

I'd be inclined to brush an entire tile rather that part, it would even the process.

Yes it does remove some material, how much material would be dependent on how coarse a brush you use. These are diamond filament brushes available in different grades.

The one pictured above has a captive M14 nut so would fit on any hand held polisher, Flex, Makita etc.

 

[jonnyc]

Sounds like a last resort option .how much do these cost and how many would I need

 

[Concrete guy]

Sounds like a last resort option .how much do these cost and how many would I need

It is a last resort option. So let#s hope the customer is right and things sort themselves out.

It's not a stock item for us, we can order them in though.

How many you'd need would be determined by how many tiles you have to refurbish, the degree of brushing you need to match and the size of head required.

Stonegate stock these, this link gives you and idea of costs.

Broken Link Removed

 

[jonnyc]

It looks like a light seam of Azul Valverde to me. In which case it will be pretty dense stuff for limestone.

It will probably be moisture differences causing the issue and it's unlikely you'd be able to "clean" it.

It could be this stone.looking at images on google some are very similar.is azul same as mole sons blue

 

[Concrete guy]

It could be this stone.looking at images on google some are very similar.is azul same as mole sons blue

Azul simply means Blue in Portuguese/Spanish.

Therefore Azul Valverde = Blue Valley.

Azul Moleanos is generally known here as Gascogne Blue.

Valverde and Moleanos are different quarries, both in Portugal. The blue occurs in seams within the beige bedrock, which is often why you can find blue/beige mixed colours.

You get a number of different shade of these products dependent on which quarry/seam it comes from.

I'd generally ignore whatever name Mandarin give it, they tend to make them up rather than use recognised regional names for their stone. It stops people Googling to find the products cheaper elsewhere.

If you do a lot of stone it's not difficult to buy direct.

I used to deal with these people a great deal:-

http://www.airemarmores.pt/

They are actually the quarry owner and producer, so a lot of the smaller producers would be buying blocks from these people to start with. Orders can be from as little as 100m2 and they will organise truck freight for you.

This firm is also very good:- http://www.dimpomar.com/en/ particularly for some of the nice Portuguese marbles from the Estremoz region. Generally a longer lead time though.

 

[widler]

Jonny, a good mate of mine works for mandarin, want me to send him pics and ask?

 

[jonnyc]

Jonny, a good mate of mine works for mandarin, want me to send him pics and ask?

Yes by all means.thanks.i have been on to them today and someone from mandarin will call Tuesday.

 

[jonnyc]

Ats .the stone does vary from blue to grey beige mix.most probably one or the other.doesnt matter that much.what I do find interesting is that I have no one on this forum or another has come across tiles getting brown marking when edges are exposed to sunlight.i have come Across this many times but in every other instance I have never fixed pieces with these marks or cut them off.this is first brine I gave been instructed by client to lay as is.

 

[Freeze]

Sorry John, have not been on, flat out at the moment, have worked the last 16 days straight through so only just seen this post, I have fixed Blenheim a few times, and have seen this problem before but not to this extent, more like picture framing. Had that issue with a showroom floor I did with Blenheim, and was told just to fix it leaving out the really bad pieces, I tried loads of different chemicals but didn't change the appearance at all, I thought at the time it was moisture, and over time it did improve, but was still visible, I wouldn't be happy with fixing that before I had a solution, let me know what Mandarins advice is on it

 

[Freeze]

And it was a brown marking

 

[Freeze]

John, speak to Robin who is the buyer, failing that Carl Ryan or Sam Small

 

[jonnyc]

Carl thought moisture which it isn't.think Sam going to call me Tuesday.
is this moleanos blue ?