Granite uniform color and tough wear-resistant texture, marble soft and elegant color and natural fresh lines, beautify our living environment, make us fully feel the beauty and charm of nature.At the same time of use, pay attention to cleaning and maintenance.With the development of science and technology, stone cleaning technology is changing with each passing day. There are some technology related to science and technology. The original technology based on manpower is gradually falling behind, and some new technology is emerging at the same time.

In terms of its cleaning mechanism, Shanghai runqia laser cleaning can be divided into the following two categories：

1、Absorption coefficient。Most of the laser energy radiated to the surface is absorbed by the surface attachment, which makes it heated or vaporized or expanded instantaneously, and is driven by the steam flow formed on the surface to separate from the object surface, so as to achieve the purpose of cleaning.However, the substrate will not be damaged because the laser absorption energy of this wavelength is very small. For this kind of laser cleaning, choosing the appropriate wavelength and controlling the laser energy is the key to achieve safe and efficient cleaning.

2、The laser energy absorption coefficient applied to clean substrate and surface attachment is not different, or substrate is more sensitive to acid vapor formed by coating heating, or toxic substances will be produced after coating heating.This kind of method usually uses the high power and high repetition rate pulse laser to shock the cleaned surface, so that part of the beam can be converted into sound wave.After the sound wave hits the hard surface of the lower layer, the near back part and the incident sound wave generated by the laser explode slightly. The coating is crushed and pressed into powder, and then removed by the vacuum pump, while the underlying substrate will not be damaged.

Laser has the characteristics of high brightness, high directivity, high monochromaticity and high coherence, which can not be compared with ordinary light sources.Using the high brightness of the laser, after focusing through the lens, the temperature of tens of millions of degrees or even tens of thousands of degrees can be generated near the focus.The high directionality of laser makes it possible for long-distance laser transmission.The laser has high monochromaticity and single wavelength, which is conducive to focusing and wavelength selection.

Compared with the traditional cleaning methods, such as mechanical friction cleaning, chemical corrosion cleaning, liquid-solid strong impact cleaning, high-frequency ultrasonic cleaning, etc., Shanghai runqia laser cleaning has obvious advantages.It has the advantages of high efficiency, high efficiency, low cost, small heat load and mechanical load on the substrate, non-destructive cleaning, recyclable waste, no environmental pollution, safe and reliable, and no damage to the health of operators.Multi function, can remove coating of different thickness and components; the cleaning process is easy to realize automatic control, remote control cleaning, etc.