What causes picture framing?
Picture framing is mainly caused when using resin based sealers for two different reasons with the same result.
1. Sealing of the tiles too quickly after laying entraps moisture. This moisture will generally migrate to the centre of the tile which is drier than the edges causing staining.
2. Sealing of the grout and tile before the grout has dried out sufficiently will result in the moisture migrating into the tile as it cannot evaporate causing staining.
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