Can a wall printer print on any wall?

In today's era of rapid technological advancement, wall printers, as a major innovation in digital printing technology, are gradually changing our perception of wall decoration. From monotonous white walls to lifelike murals, from simple color blocks to complex patterns, wall printers seem to be capable of doing anything. But can they really print on any wall? 
Working Principle and Advantages
The wall printer is a large-scale digital printing device. It uses a computer to control the nozzle to perform precise printing on the wall surface. Compared with traditional manual painting or wallpaper pasting, it has three significant advantages: 
High efficiency: Significantly reduces construction time, and a whole wall can be printed in just a few hours. 
High precision: Capable of reproducing complex patterns and delicate color transitions 
Personalization: Any design pattern can be customized according to customer requirements. 
Technical Limitations and Challenges
Although the technology is advanced, the wall printer is not truly "all-purpose". Its practical application is constrained by various factors: 
Wall material 
Applicable materials: The wall materials that the wall printer can print on are quite diverse, including plastered walls, latex paint walls, siliceous mud walls, glass, tiles, brick walls, color steel, roller shutters, etc.
Unsuitable materials: Some special materials or walls with overly smooth, rough, or porous surfaces may affect the printing effect. For example, untreated cement walls (which may have dust, unevenness, etc.) and metal surfaces (which may require special ink or pre-treatment), wood surfaces (where an appropriate ink needs to be selected based on the characteristics of the wood) etc.
2. Wall flatness 
Flat wall surface: For walls with good flatness, the wall printing device can print normally, ensuring the clarity of the pattern and the uniformity of the color.
Uneven wall surface: If the wall has significant unevenness (exceeding the sensing range of the printer sensor, usually 2-5 centimeters), it may affect the printing effect, resulting in uneven ink distribution or nozzle collisions. Some high-end models are equipped with a curved surface tracking function, which can adapt to the uneven wall surface to a certain extent, but there are still limitations. 
3. Wall color 
Light-colored walls: White or light-toned walls are ideal for wall printers as they allow the patterns to be displayed with maximum color and detail.
Dark-colored walls: Dark walls may affect the color display of the patterns, resulting in reduced color saturation or insufficient contrast. Some printers can improve this by adjusting the ink quantity or using special inks, but the effect may not be as good as that of light-colored walls.
In conclusion, wall printers can adapt to various walls, but they are not suitable for all walls. In practical applications, it is necessary to choose the appropriate printer and ink based on the specific conditions of the wall, and may require pre-treatment or parameter adjustments to achieve the best results. Solutions in practical applications
Facing these challenges, the industry has developed various coping strategies: 
Pre-treatment process: Optimizing the condition of the wall surface through methods such as sanding and priming. 
Development of special inks: Special inks tailored for different materials continuously enhance their adaptability. 
Sensor technology: The new printer is equipped with a distance sensor, which can automatically adjust the height of the nozzle to accommodate minor irregularities. 
Mechanical adjustment: Some high-end devices allow for adjustment of the printing angle to accommodate walls with certain curvatures. 
With the advancement of technology, the adaptability of wall printers is constantly increasing. The development of nanoscale ink technology, the improvement of 3D scanning positioning accuracy, and the application of artificial intelligence algorithms are gradually breaking through the existing limitations. In the future, we may witness the emergence of devices that truly enable "any wall to be printed".