Tiling Discoloration Advice

[Joker_Disco]

Any of you experts care to offer advice as to why one of my tiles appears to have discolored? Third white tile up on the right if you hadn't noticed.

JD.jpg (66.69 KiB) Viewed 1106 times

They are polished so I dont see how they would fade? I can only assume that it's due to some sort of water saturation from behind but cant understand why its only the one tile and three up from the bottom

Thoughts?

[royaloakcarpentry]

They look like polished porcelain to me. Which should not be absorbing water, anyway. (Unless they are the krap which comes out of B&Q and such like places......Chinese imports)

The way the light hits a tile can make it look a slightly different shade.
Some tiles do vary slightly in shade, even of the same batch.
Some tiles if not laid in the same direction (indicated by writing or an arrow on the reverse) can appear a different shade.


I got cream tiles once for a cream kitchen......they were light grey when put up. laid flat, they were cream!

[haveagohero]

They look like polished porcelain to me. Which should not be absorbing water, anyway. (Unless they are the krap which comes out of B&Q and such like places......Chinese imports)

The way the light hits a tile can make it look a slightly different shade.
Some tiles do vary slightly in shade, even of the same batch.
Some tiles if not laid in the same direction (indicated by writing or an arrow on the reverse) can appear a different shade.


I got cream tiles once for a cream kitchen......they were light grey when put up. laid flat, they were cream!

Had that problem in a bathroom, same tile on the walls and floor, floor looked cream, walls looked grey!

If they were ceramic I would have definitely said the biscuit was wet, has it just turned like that or was It always like that?

[royaloakcarpentry]

I have only seen the bisque absorb moisture at the edges due to too much water in the grout and excessive washing. Even then 4 or 5mm in from the edge of the tile and it produced a darker shade to the ceramic.

Not on my work, by the way. Affected tiles had been taken off and being shown in tile shop whilst I was in there.