Not all the granites are equal. They are as varied as grains of sand on a beach. The various granites have to change the chemical and crystalline makeups. These characteristics make them react differently when water soaks in the micropores with the granite. A thing this observation with you illustrated is that the liquids can soak in the polished faces with surface with granite.

The atmospheric pressure of pushing on the cups of aspiration worsened the situation. 14 books per square inch +/- pressure on other side of the granite of the cups drew deeper saliva and moisture in the granite. If saliva were just placed on the top of the granite polished, the atmospheric pressure on each side of the granite is identical, and the surface tension could to the minimum reduce the depth to which saliva would penetrate in the granite. But when you apply a vacuum, saliva can be drawn deeply in the granite.

The moisture of the causes of saliva ignite to refract differently and this is why you see a dark spot. Once that the granite dries, the dark spot usually leaves. The scelleurs help to block the pores and the microscopic cracks in the granite thus water and oils rest on surface.

Stains become permanent when the liquid cannot leave the granite.Oils are such a liquid. It can be very difficult to raise them of a granite surface. They is boxes with a pizza pie of reason should never not be placed on a granite top. The can of oil soak in the box with paperboard and then pass in the granite.

If the workman had the pin right out of a stopper to chew the tobacco or to eat sheath with the tomato sauce, then there is a chance its coloured molecules contained by saliva which could soil the granite. If it is the case, the granite supplier probably has the special pickling solutions which can be employed to remove the spots.

The thing of one is for certain, do not seal the granite until surface is spot-free. The sealing of the granite could close the spot on the stone in a permanent way.