There is a growing demand for cleaner technology with increasing precision in the preservation of cultural heritage - technology that offers greater selectivity while minimizing the impact on the original structure of the artwork. The laser offers a solution that meets this requirement because it provides the operator with a completely new tool that can be integrated with current physical and chemical means.Thus, lasers meet the growing demand for technological adaptation due to new regulations and the increasing use of lasers by public institutions to protect cultural heritage.Thanks to ongoing research, the range of applications for different materials is becoming wider.The use of lasers on the stone surfaces of individual monuments and historic buildings has now been recognized by the industry and has become a widely accepted restoration technique.As a result of an ongoing commitment to internal research and development, Usiland's products have contributed to the preservation of cultural and artistic heritage over the years.Through the development of cooperation with the most important domestic research centers and the most important on-site remediation tests, some highly innovative solutions have been proposed.

Application of laser in cultural relic restoration abroad：
>  Donatello's the Prophet Abacuc in Florence, the Door of the Mandorla and s. Maria del Fiore's domed balcony, Giambologna's the Rape of the Sabines, the baptistery's paradise gate, and the National Bargello Museum's Verrocchio's David and Donatello's sAttis
>  Gaia fountains in Jacopo Della Querciathe in Siena and circular frescoes of the old saccharine chamber and Manto Chapel of s. Maria alla Scala
>  The Leaning Tower of Pisa and the s. Ranieri gate of the cathedral
>  The Leaning Tower of Pisa and the s. Ranieri gate of the cathedral
>  Teodorico’s Mausoleum in Ravenna
>  The front of the Certosa in Pavia
>  The balcony of the Ducal Palace in Venice
>  The Paolina Chapel of the Palazzi Apostolici at the Vatican
>  Lugano cathedral (Switzerland)
>  Bass reliefs of the Holy Sepulchre in Jerusalem
>  The Abbey of the cathedral in viedo, Spain
>  The temple of the national sculpture museum in Valladolid
>  The door of mallorca cathedral
>  The doors of Diocletian's Palace and Dubrovnik cathedral in Split, Croatia

The application of laser in the restoration of cultural relics:
>  Yungang grottoes, shanxi: wash ink stains
>  Mianyang green water temple: cleaning smoke, moss
>  Nanjing taiping heavenly kingdom fresco: cleaning mold
>  Guangxi huashan rock paintings: cleaning ink stains
>  Leshan Buddha: wash moss
>  Xi 'an qianling: clean the rust
>  Chongqing dazu stone carving: cleaning mold


Using laser technology to clean historical artifacts and artThe surface has four main advantages : 
1、Minimization Intrusion
No physical contact between the laser device and the surface to be treated.This allows manipulation on extremely fragile or easily changeable surfaces, even before solidification.Second, by acting directly on the surface, the laser does not require any additional binder or chemical aid.
2、High degree of control
A high degree of controlled stripping of the deterioration layer can be measured by the fact that a single pulse involves only a few microns in thickness, which allows the depth to be reached by the repair with great precision.
3、selectivity
The physics of laser utilization is that the light absorption coefficients of various materials vary depending on the color of the material.In most cases involving black or very dark colors, the layer of deterioration to be removed completely absorbs light, allowing the laser removal process (melting) to be accomplished almost instantaneously.And vice versa, the substrate of the material to be preserved, usually in a lighter tone, largely reflects the incident light, thus limiting or preventing the effect of the laser.
4、High accuracy
The cleaning process involves only the area of the laser beam, and the surrounding area is not affected by any mechanical or thermal processes.Moreover, fiber optic lasers allow the treatment of rather complex surfaces.The zoomable handheld laser head provides great flexibility while also being used to handle large surface areas or extremely small details.

Italian client	Henan Museum	Chongqing dazu stone carving
cleaning moss、mold	clean the rust	dazu stone carving