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Cleaning Projects
Colonnades – Rome, Italy
Colonnades, Rome
Objects: 284 columns around St. Peter's Square (Vatican)

Building Material: Travertin

Typ of Soiling: Environmental pollution (acid rain, vehicle emissions)

Cleaning Equipment: Blasting gun with compressed air, environment-friendly abrasive (calcium cabonate) and reduced water flow (HDS 1195)

Period of Cleaning: July - October 1998

Karcher Cleaning Systems Sdn. Bhd.