On March 15, Hue Monuments Conservation Center and Karcher Group conducted a project of cleaning Ngo Mon Gate – a relic in the Hue Citadel Complex system, a human-cultural cultural heritage recognized by UNESCO in 1993.
Ngo Mon gate condition
Located in a country with a humid and rainy tropical monsoon climate, Ngo Mon became a perfect place to develop algae, moss, fungi, bacteria and lichens on the surface.
Furthermore, the condition of the damaged surface leads to the seedlings can be rooted through cracks in the city gate.
The method of the project
With the aim of preserving this precious historical Hue Citadel monument, experts from Germany use high-pressure cleaners to remove perennial biological soiling on walls.
Read more: Understanding Hue Citadel Complex
In this method, they use hot steam technology. Via a special nozzle that produces steam pressure on the limestone surface.
As a result, the heating system can generate the steam with a maximum temperature of approximately 100° Celsius, completely removing all kinds of pollutants/biological soiling, etc.
Also, it helps kill bacteria, mold resides deeper inside the rock holes into the high temperature of hot water. This means slowing down the growth time of these harmful biological layers.
The aim of the project
Actually, the program aims to support free cleaning for cultural and historical monuments on all 5 continents. In it, the typical project is to clean up the Redeemer Statue in Rio De Janeiro, Brazil; Mount Rushmore – National Memorial, USA; Nihonbashi Bridge, Japan, etc.
The project performed at Ngo Mon Gate and Hue Citadel. In fact, it was not only contributes to embellish the landscape. Moreover, it completed heritage space in Hue Citadel Complex and helped attract more visitors to learn about Hue. Karcher also expressed his commitment to support the preservation of old cultural heritage in Vietnam.BOOK AN EDUCATIONAL HUE IMPERIAL CITY TOUR NOW