Process depends printing The traditional holographic method involves pouring the raw material that is in the form of a powder or a soluble substance or a liquid on a flat form. After the first layer is cohesive, the “print head” returns to put a new thin layer over the first layer, and when the second layer coheres, the print head puts a third layer on top the second. Finally, the layers begin to build up to form the three-dimensional object.
But one of the disadvantages of traditional 3D printing is the consumption of time that was sometimes up to 48 hours to produce a stereoscopic, in addition to its inability to produce objects with high accuracy, or contain moving parts such as machine arms, and this is what the new technology promises. Zolography.
Researchers have developed a 3D printing technique, which can produce objects at a scale of micrometer to centimeter with features of micrometer scale, based on chemical reactions resulting from the intersection of two light beams.
The new technology ushered in research published in the prestigious journal Nature in December 2020; Where that technology allows, which I call “Zolography“ By printing solid objects with a resolution of 25 micrometers and a hardening rate of 55 mm cubic per second, which translates into printing high-precision products ten times that of conventional 3D printing, in addition to increasing the speed factor significantly as well.
Chemist Stefan Hecht, co-author of the study, and materials scientist at Aachen University at Germany, The new technology relies on transferable photocatalysts to induce solidification of a resinous liquid (gum, an organic secretion that contains hydrocarbons from plants), where two light beams with different wavelengths intersect.
Hecht explains to “Sky News Arabia” the way the new technology works in detail, saying: “More specifically, this means that a sheet of ultraviolet light excites a thin layer of special particles inside the resin from an initial rest state to a latent state with a finite life, then a device is born.” Show a second wavelength light, and focus the cross-sectional images of the 3D model (to be printed) to be fabricated in the plane of the light plate. “
And he adds: “Only the particles in the latent state absorb the projector’s light and cause the hardening of the resin layer, by displaying a video clip of images during the simultaneous movement of the resin through the fixed optical setup. Then the desired object is manufactured, ie the printing process is completed.”
Hecht points out that the reason for the name of the new technology as “xolography” comes from the fact that the crossing of light rays (x) generates the entire object (holos) by means of the new printing process (graphy), hence the term xolography “zolography”. The new technology has begun to print a variety of applications in rapid prototyping and additive manufacturing.
After inventing the “zolography” technique, researchers were able to manufacture free-moving objects without any supporting structures, such as simple machines with wheels that could rotate, and they also printed a very detailed 3 cm wide bust of a person with well-defined internal anatomical features, such as a nasal passage. Hollow and esophagus. They can also print high-resolution solids such as glass.
In the future, they will have the ability to manufacture even more complex sensors and electronics.
It is noteworthy that the 3D printing technology first emerged in 1983, after the American Chuck Hull discovered the idea while using ultraviolet light to harden the coating of the surface of the table, and then he defined the three-dimensional printing or lithography as a method and device for making solid objects through “printing” layers Thin streak of UV curable material one on top of the other.