Posted By Bill Elliott One of the benefits of using ceramic/quarry tiles in food preparation is their uniform easily cleanable surface that is reasonably impact resistant. Etching the surface could well be shooting yourself in the foot as you are then creating a surface that can no longer be "easily cleaned and/or disinfected" as you will have damaged the protective layer on the surface of the tile. This in turn sets up a breeding ground for dirt/bacteria and the consequent problems of maintaining durable, easily cleanable surfaces. It sounds to me like a short term response to another problem - what is the issue you are trying to resolve?

Posted By CFT It is actually possible to seal the surfaces with a water based product that contains millions of non slip polymers, the finish can be a low shine and will not allow dirt to stain the floor; it is actually the sealed finish that you walk on and maintain. It can be further protected with a mettalised emulsion finish that is both durable and has very good non slip properties. I would consider other options before going down the etching route; a coating of carborundum particles applied to the surface may yield a reasonable result, alternatively you might also think about an all over high solids, high build coating of an epoxy finish with non slip properties. I agree with an earlier post that etching may cure one problem but introduce another of altogether differing proportions. Good luck

Posted By Ken Taylor I've had swimming pool changing room tiled floors treated with the 'addition' method rather than the subtraction (etching) one. This has improved slip resistance greatly and lasted about 5 years before needing retreatment.