White Grout gone blue

[Lukemac]

Hey guys and gals

I have just tiled a bathroom floor to ceiling(30m2) with granfix maxi white grout. The grout has dried and is a patchy blue and white!!! It looks horrible. some places are white some are a bluey colour. It is only the surface of the grout though, if I scratch away a bit of the blue it is white underneath. Does anyone no the cause of this??????

thanks in advance

 

[Gazzer]

What did you wash off with and polish off with.

 

[ukProTile]

Thats what im wondering?

 

[Ian]

Just what I was thinking Neale. I've turned White grout pink before with a red polishing cloth.

 

[ukProTile]

karl dahm polishing cloths are the nuts!

 

[Lukemac]

washed of with proper grout sponge. minimal water. and polished with a biege dusting cloth

 

[ukProTile]

what colour where the tiles? also, what were they ie porcelain? maybe contained a wax face?
did you wash the tiles before grouting?

 

[Gazzer]

were you wearing gloves ?

 

[Gazzer]

Oh and what colour was the bucket you mixed in ?

 

[Lukemac]

No! Is that important???

 

[Gazzer]

Well if the blue is on the surface then its not coming through the grout so it cant be a substrate issue. So more likely from the grout float, sponge, ink off the bag of grout etc etc.
When you clean a joint does the blue return ?

 

[Lukemac]

Bucket was yellow. just state the blue is not a dark blue. Its a light blue but u can definately see it is a shade of blue

 

[Gazzer]

Just for the record though, what was the condition of the substrate. If you can tell us step by step what you actually did and all materials then it may save us grasping at straws.

 

[Gazzer]

Have you any grout left. if so mix some up with clean tools and spread it over a tile. See if the blue is in the grout itself.

 

[Dan]

Has it fully cured? When was the grouting finished?