What's the tile material and what is the application? A grout line is a personal decision, assuming all things are equal.

You can use natural stone like marble for floor but do not use granite for floor at all as it is very slippery when wet. As for tiles do not go for glazed vitrified tiles for the floor for the same reason. ( floor becomes slippery once wet and may cause mishap) Go for ceramic anti skid tiles that are specially meant for bathroom floor. For wall tiles you can use whatever you like and then decide over the matching anti skid floor tile/ marble. Double charged vitrified tiles are usually used for flooring in rest of the house.

yes. possible to get tiles digitally printed but it would cost an arm and a leg. ball park figure over rs 1000 per sqft

How to Remove Cement Stains From Tiles Pour a generous amount of vinegar into a bowl. Place a clean rag in the bowl to soak up the vinegar. ... Keep the rag over the stain for 2 hours to allow the vinegar to soak into the cement. ... Remove the rag from the stain, and scrub the stain with a scouring pad. ... Dampen a sponge in water, and rinse the area with the sponge. I took these suggestions off the net by the way. I've never tried it myself! All the best. Acid is corrosive so unless you have an expert who can determine how much to dilute the solution, it can be a bit tricky