The TRILOGY is suitable for cleaning headstones made of stone, marble, granite or brick which have been contaminated with black soot, atmospheric pollution, carbonisation, and other deposits that have solidified on the surface. With the use of the HELIX nozzle, even decorative pieces become easy to clean. Using the “DRY” method with calcium carbonate (Carbonart Z6) the system can clean very porous and degraded surfaces. The air pressure must never be higher than 22 PSI (1.5 bar) and should be held at a distance of 30/40 cm. Using the “WET” method with calcium carbonate (Carbonart Z5") and water, it creates an ideal cleaning system for non-porous stone and marble.