How does the concrete on the tiles clean?
Daily cleaning: clean soapy water
Mud: linseed oil
Precipitate, rust, mortar: nitric acid, sulfuric acid, hydrochloric acid solution
Do not forget to protect your hands with rubber gloves when scrubbing with diluted oxalic acid. First with a brush in a place where there is cement, 3-5 minutes after a rub with a dry cloth off
Often the right way is to use oxalic acid.
Apply oxalic acid to a concrete tile, wait 10 minutes later, rinse with water, brush with a brush, it is easy to get rid of. General small grocery store has this kind of decoration for the removal of cement and other stains after the small bottle (500ml) sales. If not, you can also use an acidic toilet cleaner. The above two principles are to use acid to neutralize the alkaline slurry.
Water bubbles, and then use the clean ball can be washed off
